Energy is the quantity that always balances and never stays useful. This room follows it from the symmetry that conserves it, through the entropy that degrades it, to the nucleus it nearly all came from.
<!-- ENERGY-SEED:START -->
## What energy is, and what it is not
Energy is the most useful quantity in physics and the hardest one to say anything true about in a sentence. It is not a substance, not a fluid, and not a thing a system contains in the way a jar contains water. Richard Feynman put the difficulty plainly in the Lectures: physics has no knowledge of what energy IS -- what we have is a number, calculable in several different ways, that comes out the same before and after anything happens. Energy is the bookkeeping that always balances.
That conservation is not an accident of the equations. Emmy Noether proved in 1918 that every continuous symmetry of a physical law implies a conserved quantity, and energy is the one that follows from time-translation symmetry: because the laws of physics are the same today as yesterday, energy is conserved. This is the deepest statement in the room, and it explains an otherwise strange fact -- in general relativity, where spacetime itself evolves and time-translation symmetry fails globally, energy conservation becomes genuinely problematic.
The second thing to hold onto is that conservation is not the interesting constraint. Energy is never used up; it is degraded. Every real process conserves energy exactly while converting some of it into forms from which no further work can be extracted, and the quantity tracking that one-way slide is entropy. A power station does not consume energy, it downgrades it. The bill we pay is for low-entropy energy, and the waste we produce is the same energy at higher entropy. Almost every practical question in this room -- efficiency, storage, transmission, fuel -- is a question about entropy rather than about energy.
Third: nearly all of it started as nuclear binding energy. Sunlight is hydrogen fusing in a core, fossil fuel is buried sunlight, wind and hydro are solar-driven circulation, and fission and fusion are that same binding energy tapped directly. Only geothermal and tidal energy come from elsewhere -- radioactive decay in the Earth's interior, and the Moon's orbital angular momentum.
## The six bands, and why they are in this order
The spine below is curated rather than alphabetical, and the ordering is an argument that runs from the most abstract statement to the most concrete artefact.
**I -- What energy is (1-10).** Conservation, the forms energy takes, and energy carried as waves and quanta. The band exists to establish that "energy" names a bookkeeping relation, not a stuff, before anything is done with it.
**II -- Heat and the arrow (11-20).** Where energy acquires a direction. [[Kinetic_theory_of_gases]] shows that temperature simply IS molecular motion, and that the gas laws fall out of counting wall collisions. [[Entropy]] shows that the arrow is statistical, not mechanical -- reverse every velocity and the gas really does un-mix, briefly. [[Second_law_of_thermodynamics]] turns that into the hard ceiling on every engine ever built.
**III -- Information and energy (21-26).** The band most people are surprised to find here. Shannon's entropy is not merely analogous to Boltzmann's -- Landauer's principle makes the link physical: erasing one bit of information must dissipate at least k_B*T*ln(2) of heat, about 3e-21 joules at room temperature. Information processing has a thermodynamic floor, and that is why computation generates heat.
**IV -- Nuclear (27-40).** Where the energy actually came from. [[Binding_energy]] is the band's keystone: one curve, peaking at the iron group, explains why fusion releases energy below the peak and fission releases it above. Everything else here is a consequence -- decay modes, chains, fuels, plasma confinement.
**V -- Carrying and storing (41-49).** Energy is easy to make and hard to move and store. This band is about the carriers: grids, superconductors, semiconductors, hydrogen. The grid is the largest machine ever built and it must balance supply and demand continuously, because electricity is generated and consumed in the same instant -- frequency is the signal that the balance is holding.
**VI -- Energy in systems (50-52).** Modelling, limits, and metabolism, where the physics meets ecology and economics.
## Spine
<!-- SECTIONSIMS:BEGIN g34 2026-09-19 - microsims the articles linked here play; generated by _tools/generate/g34_portal_section_sims.py; do not hand-edit inside -->
*Microsims from the articles this section links:*
<div class="wt-simrow">
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Wave.html" data-title="Wave · matter"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Zero-point_energy.html" data-title="Zero-point energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Kinetic_theory_of_gases.html" data-title="Kinetic theory of gases"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Entropy.html" data-title="Entropy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Second_law_of_thermodynamics.html" data-title="Second law of thermodynamics"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Heat_transfer.html" data-title="Heat transfer · matter"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Binding_energy.html" data-title="Binding energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/thury/Nuclear_fusion.html" data-title="Nuclear fusion"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Decay_chain.html" data-title="Decay chain · matter"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/thury/Plasma_(physics).html" data-title="Plasma (physics) · thury"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Nuclear_magnetic_resonance.html" data-title="Nuclear magnetic resonance"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Electrical_grid.html" data-title="Electrical grid · matter"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Electric_power_transmission.html" data-title="Electric power transmission · matter"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Superconducting_magnet.html" data-title="Superconducting magnet"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Hydrogen_production.html" data-title="Hydrogen production"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/thury/Hydrogen_bond.html" data-title="Hydrogen bond · thury"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Carrying_capacity.html" data-title="Carrying capacity"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/Uf3g0uO_e" data-title="Energy transformation"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/acoustics/Wave.html" data-title="Wave · acoustics"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/pQPM1m6eN" data-title="Wave · p5.js"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/acoustics/Wave_equation.html" data-title="Wave equation · acoustics"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/rGvUcgG8H" data-title="Wave equation · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/tNdeZlofd" data-title="Sine wave"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/b0gIqrpjh" data-title="Photon"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/Tik1Rbh9Q" data-title="Electron"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/A_73AMciC" data-title="Quantum mechanics"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/npXlwW_az" data-title="Zero-point energy · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/dPYboO9TR" data-title="Thermodynamic equilibrium"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/7gb4l972L" data-title="Kinetic theory of gases · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/A-Lx_2q2s" data-title="Entropy · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/yFUkglebS" data-title="Second law of thermodynamics · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/QRea-7JU3" data-title="Heat transfer · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/ZoDIpgATd" data-title="Diffusion"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/alvczWLrB" data-title="Entropy (information theory)"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/0Bxx394Yu" data-title="Conditional entropy"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/iOkGPXBpB" data-title="Joint entropy"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/89fUuxHoL" data-title="Differential entropy"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/q_kzHjs2s" data-title="Noise (electronics)"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/REj7QBkj4" data-title="Quantum computing"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/qRQ8UgF6G" data-title="Binding energy · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/8NIJKebDh" data-title="ENGINES Nuclear_fusion"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/ndeZ3IkXH" data-title="Radioactive decay"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/TZoPav0Tw" data-title="Alpha decay"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/RnDl-UCo_" data-title="Beta decay · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/6EKFi6NAU" data-title="Beta decay · p5.js (2)"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/9S8vQrTla" data-title="Spontaneous fission"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/cS_SZr-RA" data-title="Decay chain · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/dRi1gJpsi" data-title="Decay chain · p5.js (2)"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/1dKbR6vAT" data-title="Decay product"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/Tb2hfHDgn" data-title="Plasma (physics) · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/810vYsbef" data-title="Fusion rocket"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/sTaq4v2KA" data-title="Ionization energy"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/N56o6yfcQ" data-title="Nuclear magnetic resonance · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/RjqYR__Lt" data-title="Magnetic resonance imaging · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/NXAxGfamM" data-title="Magnetic resonance imaging · p5.js (2)"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/o-KZ5R9hV" data-title="Electrical grid · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/xsQloH63c" data-title="Electric power transmission · p5.js"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/Xu7mG4Yo_" data-title="Superconducting magnet · p5.js"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/electronics/Resistor.html" data-title="Resistor"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/electronics/Capacitor.html" data-title="Capacitor"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/electronics/Inductor.html" data-title="Inductor"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/electronics/Diode.html" data-title="Diode"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/electronics/Transistor.html" data-title="Transistor"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/electronics/Alternating_current.html" data-title="Alternating current"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/electronics/Electric_motor.html" data-title="Electric motor"></div>
<div class="wt-sim" data-src="https://wikitube-elements.netlify.app/?el=H&embed=1" data-title="The Elements 3D microsim - Hydrogen"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/igQKlUTcC" data-title="Hydrogen production · p5.js"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Hydrogen_bond.html" data-title="Hydrogen bond"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/fJsCCqMrI" data-title="Helium storage and conservation"></div>
</div>
<!-- SECTIONSIMS:END -->
| # | Article | Reveal | Microsim | Node |
|---|---------|--------|----------|------|
| 1 | [[Energy]] | three;svg | *planned* | band:I |
| 2 | [[Energy_transformation]] | three;mermaid | *planned* | band:I |
| 3 | [[Work_breakdown_structure]] | mermaid | | band:I |
| 4 | [[Wave]] | p5;three | live · https://wikitube-3d-microsims.netlify.app/matter/Wave.html | band:I |
| 5 | [[Wave_equation]] | three;p5 | *planned* | band:I |
| 6 | [[Sine_wave]] | p5;svg | | band:I |
| 7 | [[Photon]] | three;p5 | *planned* | band:I |
| 8 | [[Electron]] | three;svg | | band:I |
| 9 | [[Quantum_mechanics]] | three;svg | | band:I |
| 10 | [[Zero-point_energy]] | three;svg | live · https://wikitube-3d-microsims.netlify.app/Zero-point_energy.html | band:I |
| 11 | [[Thermodynamics]] | svg;mermaid | | band:II |
| 12 | [[Thermodynamic_system]] | svg;mermaid | | band:II |
| 13 | [[Thermodynamic_equilibrium]] | p5;svg | | band:II |
| 14 | [[Kinetic_theory_of_gases]] | three;p5 | [three](https://wikitube-3d-microsims.netlify.app/Kinetic_theory_of_gases.html) | band:II |
| 15 | [[Entropy]] | three;p5 | [three](https://wikitube-3d-microsims.netlify.app/Entropy.html) | band:II |
| 16 | [[Second_law_of_thermodynamics]] | three;svg | [three](https://wikitube-3d-microsims.netlify.app/Second_law_of_thermodynamics.html) | band:II |
| 17 | [[Heat_transfer]] | three;p5 | live · https://wikitube-3d-microsims.netlify.app/matter/Heat_transfer.html | band:II |
| 18 | [[Diffusion]] | p5;three | | band:II |
| 19 | [[Josiah_Willard_Gibbs]] | svg | | band:II |
| 20 | [[Reaction–diffusion_system]] | p5;three | | band:II |
| 21 | [[Entropy_(information_theory)]] | p5;d3 | | band:III |
| 22 | [[Conditional_entropy]] | d3;svg | | band:III |
| 23 | [[Joint_entropy]] | d3;svg | | band:III |
| 24 | [[Differential_entropy]] | d3;svg | | band:III |
| 25 | [[Noise_(electronics)]] | p5;d3 | | band:III |
| 26 | [[Quantum_computing]] | three;svg | | band:III |
| 27 | [[Binding_energy]] | three;d3 | [three](https://wikitube-3d-microsims.netlify.app/Binding_energy.html) | band:IV |
| 28 | [[Nuclear_fusion]] | three;p5 | live · https://wikitube-3d-microsims.netlify.app/thury/Nuclear_fusion.html | band:IV |
| 29 | [[Radioactive_decay]] | three;p5 | *planned* | band:IV |
| 30 | [[Alpha_decay]] | three;svg | | band:IV |
| 31 | [[Beta_decay]] | three;svg | | band:IV |
| 32 | [[Spontaneous_fission]] | three;svg | | band:IV |
| 33 | [[Decay_chain]] | mermaid;d3 | live · https://wikitube-3d-microsims.netlify.app/matter/Decay_chain.html | band:IV |
| 34 | [[Decay_product]] | mermaid;svg | | band:IV |
| 35 | [[Nuclear_fuel]] | svg;d3 | | band:IV |
| 36 | [[Plasma_(physics)]] | three;p5 | live · https://wikitube-3d-microsims.netlify.app/thury/Plasma_(physics).html | band:IV |
| 37 | [[Fusion_rocket]] | three;svg | | band:IV |
| 38 | [[Ionization_energy]] | d3;svg | | band:IV |
| 39 | [[Nuclear_magnetic_resonance]] | three;p5 | live · https://wikitube-3d-microsims.netlify.app/Nuclear_magnetic_resonance.html | band:IV |
| 40 | [[Magnetic_resonance_imaging]] | three;svg | | band:IV |
| 41 | [[Electrical_grid]] | three;d3 | live · https://wikitube-3d-microsims.netlify.app/matter/Electrical_grid.html | band:V |
| 42 | [[Electric_power_transmission]] | d3;svg | live · https://wikitube-3d-microsims.netlify.app/matter/Electric_power_transmission.html | band:V |
| 43 | [[Superconducting_magnet]] | three;p5 | live · https://wikitube-3d-microsims.netlify.app/Superconducting_magnet.html | band:V |
| 44 | [[Semiconductor_device]] | three;svg | | band:V |
| 45 | [[Electronics]] | p5;svg | | band:V |
| 46 | [[Hydrogen]] | three;svg | | band:V |
| 47 | [[Hydrogen_production]] | mermaid;svg | live · https://wikitube-3d-microsims.netlify.app/Hydrogen_production.html | band:V |
| 48 | [[Hydrogen_bond]] | three;p5 | live · https://wikitube-3d-microsims.netlify.app/thury/Hydrogen_bond.html | band:V |
| 49 | [[Helium_storage_and_conservation]] | svg;d3 | | band:V |
| 50 | [[Energy_modeling]] | d3;mermaid | | band:VI |
| 51 | [[Carrying_capacity]] | p5;d3 | live · https://wikitube-3d-microsims.netlify.app/Carrying_capacity.html | band:VI |
| 52 | [[Metabolic_network_modelling]] | d3;mermaid | | band:VI |
## Crosslinks
Doors to adjacent rooms: [[PORTAL_Oxygen]] for combustion, respiration and the oxidising half of most energy release; [[PORTAL_Systems]] for the stock-and-flow and feedback grammar this room's models are written in; [[PORTAL_Systems_engineering]] for the reliability, optimisation and trade-off machinery behind any real plant; [[PORTAL_Hydrogen]] and [[PORTAL_Helium-3]] for the fusion fuel path; [[PORTAL_Systems_theory]] for [[Dissipative_system|dissipative structures]], the thermodynamics of self-organisation.
## Notes
Seeded 2026-08-05, replacing the 2026-07-29 stub. All 52 spine slugs were verified to exist as `wiki/{slug}.md` with a registry row before being listed -- this spine contains no forward-references, unlike the hub rooms. Reveal tags are intent, not inventory.
Microsim status: 4 of the 14 planned three.js sims are built and staged ([[Entropy]], [[Kinetic_theory_of_gases]], [[Second_law_of_thermodynamics]], [[Binding_energy]]); the 10 marked *planned* in the table are specified but not yet built. Legacy `Wikitube HUBS/.../Elements/ELEMENTS_MAIN` remains queued for the Collision Gate (WIKI_RULES section 5) -- do not link its legacy path.
<!-- ENERGY-SEED:END -->
<!-- SIMGALLERY:BEGIN v1.0 g13 — generated iframe set; do not hand-edit inside -->
## Play every microsim on this page
<p class="microsim-gallery-note">Every microsim linked from this portal, embedded live. <strong>59 players</strong> — 14 threejs · 44 p5js · 1 elements. 1 are staged but not yet deployed and show as placeholders.</p>
<ul class="microsim-gallery">
<li class="microsim-card" data-lib="threejs">
<iframe src="https://wikitube-3d-microsims.netlify.app/Binding_energy.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Binding energy — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Binding_energy">Binding energy</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/Binding_energy.html" target="_blank" rel="noopener">open full-screen</a></div></div>
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<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Dissipative_system">Dissipative system</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/Dissipative_system.html" target="_blank" rel="noopener">open full-screen</a></div></div>
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<iframe src="https://wikitube-3d-microsims.netlify.app/Entropy.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Entropy — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Entropy">Entropy</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/Entropy.html" target="_blank" rel="noopener">open full-screen</a></div></div>
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<iframe src="https://wikitube-3d-microsims.netlify.app/polytope4d.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Four-dimensional polytopes — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/WT!Three_js_Microsim_Master_Class">Four-dimensional polytopes</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/polytope4d.html" target="_blank" rel="noopener">open full-screen</a> · on <a href="https://en.wikitube.io/wiki/WT!Three_js_Microsim_Master_Class">Three.js Microsim Master Class</a></div></div>
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<iframe src="https://wikitube-3d-microsims.netlify.app/Hydrogen_bond.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Hydrogen bond — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Hydrogen_bond">Hydrogen bond</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/Hydrogen_bond.html" target="_blank" rel="noopener">open full-screen</a></div></div>
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<iframe src="https://wikitube-3d-microsims.netlify.app/Kinetic_theory_of_gases.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Kinetic theory of gases — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Kinetic_theory_of_gases">Kinetic theory of gases</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/Kinetic_theory_of_gases.html" target="_blank" rel="noopener">open full-screen</a></div></div>
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<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/REj7QBkj4" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Quantum computing — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Quantum_computing">Quantum computing</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/REj7QBkj4" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/A_73AMciC" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Quantum mechanics — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Quantum_mechanics">Quantum mechanics</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/A_73AMciC" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/ndeZ3IkXH" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Radioactive decay — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Radioactive_decay">Radioactive decay</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/ndeZ3IkXH" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/yFUkglebS" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Second law of thermodynamics — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Second_law_of_thermodynamics">Second law of thermodynamics</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/yFUkglebS" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/tNdeZlofd" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Sine wave (p5.js) — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Sine_wave">Sine wave (p5.js)</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/tNdeZlofd" target="_blank" rel="noopener">open in the p5 editor</a> · on <a href="https://en.wikitube.io/wiki/Sine_wave">Sine wave</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/9S8vQrTla" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Spontaneous fission — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Spontaneous_fission">Spontaneous fission</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/9S8vQrTla" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/Xu7mG4Yo_" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Superconducting magnet — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Superconducting_magnet">Superconducting magnet</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/Xu7mG4Yo_" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/dPYboO9TR" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Thermodynamic equilibrium — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Thermodynamic_equilibrium">Thermodynamic equilibrium</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/dPYboO9TR" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/pQPM1m6eN" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Wave — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Wave">Wave</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/pQPM1m6eN" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/rGvUcgG8H" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Wave equation (p5.js) — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Wave_equation">Wave equation (p5.js)</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/rGvUcgG8H" target="_blank" rel="noopener">open in the p5 editor</a> · on <a href="https://en.wikitube.io/wiki/Wave_equation">Wave equation</a></div></div>
</li>
<li class="microsim-card" data-lib="p5js">
<iframe src="https://editor.p5js.org/sciencenibber/full/npXlwW_az" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Zero-point energy — p5js microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Zero-point_energy">Zero-point energy</a></div><div class="ms-sub">p5js · <a href="https://editor.p5js.org/sciencenibber/full/npXlwW_az" target="_blank" rel="noopener">open in the p5 editor</a></div></div>
</li>
<li class="microsim-card" data-lib="elements">
<iframe src="https://wikitube-elements.netlify.app/?el=H&embed=1" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="🧊 Hydrogen — elements microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Hydrogen">🧊 Hydrogen</a></div><div class="ms-sub">elements · <a href="https://wikitube-elements.netlify.app/?el=H&embed=1" target="_blank" rel="noopener">open full-screen</a> · on <a href="https://en.wikitube.io/wiki/Hydrogen">Hydrogen</a></div></div>
</li>
<li class="microsim-card" data-lib="threejs">
<iframe src="https://wikitube-3d-microsims.netlify.app/Carrying_capacity.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Carrying capacity — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Carrying_capacity">Carrying capacity</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/Carrying_capacity.html" target="_blank" rel="noopener">open full-screen</a></div></div>
</li>
<li class="microsim-card is-pending" data-lib="threejs">
<div class="ms-placeholder">Staged, not yet deployed — <code>Nuclear_fuel.html</code></div>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Nuclear_fuel">Nuclear fuel</a></div><div class="ms-sub">threejs · awaiting CDN deploy</div></div>
</li>
<li class="microsim-card" data-lib="threejs">
<iframe src="https://wikitube-3d-microsims.netlify.app/Superconducting_magnet.html" loading="lazy" frameborder="0" sandbox="allow-scripts allow-same-origin" title="Superconducting magnet — threejs microsim"></iframe>
<div class="ms-meta"><div class="ms-title"><a href="https://en.wikitube.io/wiki/Superconducting_magnet">Superconducting magnet</a></div><div class="ms-sub">threejs · <a href="https://wikitube-3d-microsims.netlify.app/Superconducting_magnet.html" target="_blank" rel="noopener">open full-screen</a></div></div>
</li>
</ul>
<!-- SIMGALLERY:END -->
<!-- CRAFT-LINK:START g12 -->
**Craft standard:** Both craft standards apply here — [[WT!Three_js_Microsim_Master_Class|three.js]] and [[WT!P5_js_Microsim_Master_Class|p5.js]].
<!-- CRAFT-LINK:END -->
<!-- WT:REPOP 2026-09-11 begin -->
## Stations · added 2026-09-11 (Matter & Energy Cluster spine)
<!-- SECTIONSIMS:BEGIN g34 2026-09-19 - microsims the articles linked here play; generated by _tools/generate/g34_portal_section_sims.py; do not hand-edit inside -->
*Microsims from the articles this section links:*
<div class="wt-simrow">
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Kinetic_energy.html" data-title="Kinetic energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Potential_energy.html" data-title="Potential energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Chemical_energy.html" data-title="Chemical energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Coulomb's_law.html" data-title="Coulomb's law"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Ising_model.html" data-title="Ising model"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Harmonic_oscillator.html" data-title="Harmonic oscillator"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Newton's_laws_of_motion.html" data-title="Newton's laws of motion"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Mechanical_energy.html" data-title="Mechanical energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Chemical_thermodynamics.html" data-title="Chemical thermodynamics"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Chemical_kinetics.html" data-title="Chemical kinetics"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Redox.html" data-title="Redox"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Electric_battery.html" data-title="Electric battery"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Lithium-ion_battery.html" data-title="Lithium-ion battery"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/thury/Fuel_cell.html" data-title="Fuel cell · thury"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/thury/Combustion.html" data-title="Combustion"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Nucleosynthesis.html" data-title="Nucleosynthesis"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Schrödinger_equation.html" data-title="Schrödinger equation"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Mass–energy_equivalence.html" data-title="Mass–energy equivalence"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Heat_engine.html" data-title="Heat engine"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Thermodynamic_cycle.html" data-title="Thermodynamic cycle"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Rankine_cycle.html" data-title="Rankine cycle"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Electric_generator.html" data-title="Electric generator · matter"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Solar_cell.html" data-title="Solar cell"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Electronic_band_structure.html" data-title="Electronic band structure"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Solar_thermal_energy.html" data-title="Solar thermal energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Wind_power.html" data-title="Wind power"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Wind_turbine.html" data-title="Wind turbine"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/thury/Hydropower.html" data-title="Hydropower"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Tidal_power.html" data-title="Tidal power"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Geothermal_energy.html" data-title="Geothermal energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Nuclear_chain_reaction.html" data-title="Nuclear chain reaction"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Nuclear_reactor.html" data-title="Nuclear reactor"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Nuclear_fuel_cycle.html" data-title="Nuclear fuel cycle"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Irreversible_process.html" data-title="Irreversible process"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Conservation_of_energy.html" data-title="Conservation of energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Thermal_conduction.html" data-title="Thermal conduction"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/thury/Rayleigh–Bénard_convection.html" data-title="Rayleigh–Bénard convection"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Thermal_radiation.html" data-title="Thermal radiation"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Closed_system.html" data-title="Closed system"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Control_volume.html" data-title="Control volume"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Energy_storage.html" data-title="Energy storage"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/thury/Pumped-storage_hydroelectricity.html" data-title="Pumped-storage hydroelectricity · thury"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Flywheel_energy_storage.html" data-title="Flywheel energy storage"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/thury/Hydrogen_storage.html" data-title="Hydrogen storage"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Internal_energy.html" data-title="Internal energy"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/Debye_model.html" data-title="Debye model"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/matter/First_law_of_thermodynamics.html" data-title="First law of thermodynamics"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Fuel_cell.html" data-title="Fuel cell"></div>
<div class="wt-sim" data-src="https://editor.p5js.org/sciencenibber/full/Tpchmb17V" data-title="Nucleosynthesis · p5.js"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Electric_generator.html" data-title="Electric generator"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Water_wheel.html" data-title="Water wheel"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Water_turbine.html" data-title="Water turbine"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Pelton_wheel.html" data-title="Pelton wheel"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Francis_turbine.html" data-title="Francis turbine"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Hydraulic_head.html" data-title="Hydraulic head"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Spillway.html" data-title="Spillway"></div>
<div class="wt-sim" data-src="https://wikitube-3d-microsims.netlify.app/Pumped-storage_hydroelectricity.html" data-title="Pumped-storage hydroelectricity"></div>
</div>
<!-- SECTIONSIMS:END -->
The wt-portal spine for [[Energy]] from `_registry/plans/ENERGY_SECTIONS.md` — 70 sections, sims pending until the `/matter/` set deploys (contract: `_registry/plans/MATTER_ENERGY_CLUSTER_SECTIONS.md`). The seed portal keeps everything above this block.
| # | Article | Reveal | Microsim | Node |
|---|---|---|---|---|
| | **Part I — Forms** | | | |
| 1 | — *Forms — the lead's primary sim sits here* · *E1* | three | not built · matter/Energy.html (root) | ring:0 |
| 2 | [[Kinetic_energy]] · *E2* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Kinetic_energy.html (sibling) | ring:1 |
| 3 | [[Potential_energy]] · *E3* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Potential_energy.html (sibling) | ring:2 |
| 4 | [[Chemical_energy]] · *E4* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Chemical_energy.html (root) | ring:3 |
| 5 | = C20 (placed) · *E5* | three | placed · same sim as C20 · https://wikitube-3d-microsims.netlify.app/matter/Coulomb's_law.html | ring:4 |
| 6 | = C33 (placed) · *E6* | three | placed · same sim as C33 · https://wikitube-3d-microsims.netlify.app/matter/Ising_model.html | ring:5 |
| 7 | = C22 (placed) · *E7* | three | placed · same sim as C22 (owner's sim not built) | ring:6 |
| 8 | = C26 (placed) · *E8* | three | placed · same sim as C26 · https://wikitube-3d-microsims.netlify.app/Binding_energy.html | ring:7 |
| 9 | [[Thermal_energy]] · *E9* | three | not built · matter/Thermal_energy.html (variant) | ring:8 |
| 10 | = C19 (placed) · *E10* | three | placed · same sim as C19 · https://wikitube-3d-microsims.netlify.app/matter/Harmonic_oscillator.html | ring:9 |
| | **Part II — History** | | | |
| 11 | — *History* · *E11* | — | none (prose) | ring:10 |
| | **Part III — Units of measure** | | | |
| 12 | [[Joule]] · *E12* | three | not built · matter/Joule.html (root) | ring:11 |
| | **Part IV — Scientific use** | | | |
| 13 | — *Scientific use* · *E13* | — | none (prose) | ring:12 |
| 14 | = C18 (placed) · *E14* | three | placed · same sim as C18 · https://wikitube-3d-microsims.netlify.app/matter/Newton's_laws_of_motion.html | ring:13 |
| 15 | [[Mechanical_energy]] · *E15* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Mechanical_energy.html (root) | ring:14 |
| 16 | = C10 (placed) · *E16* | three | placed · same sim as C10 · https://wikitube-3d-microsims.netlify.app/matter/Chemical_thermodynamics.html | ring:15 |
| 17 | = C11 (placed) · *E17* | three | placed · same sim as C11 · https://wikitube-3d-microsims.netlify.app/matter/Chemical_kinetics.html | ring:16 |
| 18 | = C12 (placed) · *E18* | three | placed · same sim as C12 · https://wikitube-3d-microsims.netlify.app/matter/Redox.html | ring:17 |
| 19 | [[Electric_battery]] · *E19* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Electric_battery.html (root) | ring:18 |
| 20 | [[Lithium-ion_battery]] · *E20* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Lithium-ion_battery.html (sibling) | ring:19 |
| 21 | [[Fuel_cell]] · *E21* | three | live · https://wikitube-3d-microsims.netlify.app/thury/Fuel_cell.html | ring:20 |
| 22 | [[Combustion]] · *E22* | three | live · https://wikitube-3d-microsims.netlify.app/thury/Combustion.html | ring:21 |
| 23 | [[Photosynthesis]] · *E23* | three | not built · matter/Photosynthesis.html (sibling) | ring:22 |
| 24 | [[Food_energy]] · *E24* | three | not built · matter/Food_energy.html (variant) | ring:23 |
| 25 | [[Adenosine_triphosphate]] · *E25* | three | not built · matter/Adenosine_triphosphate.html (root) | ring:24 |
| 26 | [[Earth's_energy_budget]] · *E26* | three | not built · matter/Earth's_energy_budget.html (root) | ring:25 |
| 27 | [[Earth's_internal_heat_budget]] · *E27* | three | not built · matter/Earth's_internal_heat_budget.html (root) | ring:26 |
| 28 | = P69 [[Nucleosynthesis]] 1368907989 (placed) · *E28* | three | placed · same sim as P69 · https://wikitube-3d-microsims.netlify.app/Nucleosynthesis.html | ring:27 |
| 29 | = C24 (placed) · *E29* | three | placed · same sim as C24 · https://wikitube-3d-microsims.netlify.app/matter/Schrödinger_equation.html | ring:28 |
| 30 | = P41 `Mass–energy_equivalence` (placed) · *E30* | three | placed · same sim as P41 · https://wikitube-3d-microsims.netlify.app/matter/Mass–energy_equivalence.html | ring:29 |
| | **Part V — Transformation** | | | |
| 31 | [[Energy_transformation]] · *E31* | three | not built · matter/Energy_transformation.html (sibling) | ring:30 |
| 32 | [[Heat_engine]] · *E32* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Heat_engine.html (root) | ring:31 |
| 33 | [[Thermodynamic_cycle]] · *E33* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Thermodynamic_cycle.html (sibling) | ring:32 |
| 34 | [[Rankine_cycle]] · *E34* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Rankine_cycle.html (sibling) | ring:33 |
| 35 | [[Electric_generator]] · *E35* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Electric_generator.html (root) | ring:34 |
| 36 | [[Electric_power_transmission]] · *E36* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Electric_power_transmission.html (root) | ring:35 |
| 37 | [[Electrical_grid]] · *E37* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Electrical_grid.html (root) | ring:36 |
| 38 | [[Solar_cell]] · *E38* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Solar_cell.html (root) | ring:37 |
| 39 | = C31 (placed) · *E39* | three | placed · same sim as C31 · https://wikitube-3d-microsims.netlify.app/matter/Electronic_band_structure.html | ring:38 |
| 40 | [[Solar_thermal_energy]] · *E40* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Solar_thermal_energy.html (root) | ring:39 |
| 41 | [[Wind_power]] · *E41* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Wind_power.html (root) | ring:40 |
| 42 | [[Wind_turbine]] · *E42* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Wind_turbine.html (sibling) | ring:41 |
| 43 | [[Hydropower]] · *E43* | three | live · https://wikitube-3d-microsims.netlify.app/thury/Hydropower.html | ring:42 |
| 44 | [[Tidal_power]] · *E44* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Tidal_power.html (sibling) | ring:43 |
| 45 | [[Geothermal_energy]] · *E45* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Geothermal_energy.html (sibling) | ring:44 |
| 46 | = C38 (placed) · *E46* | three | placed · same sim as C38 · https://wikitube-3d-microsims.netlify.app/thury/Plasma_(physics).html | ring:45 |
| 47 | — *Conservation of energy and mass in transformation* · *E47* | — | none (prose) | ring:46 |
| 48 | [[Nuclear_chain_reaction]] · *E48* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Nuclear_chain_reaction.html (root) | ring:47 |
| 49 | [[Nuclear_reactor]] · *E49* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Nuclear_reactor.html (sibling) | ring:48 |
| 50 | [[Nuclear_fuel_cycle]] · *E50* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Nuclear_fuel_cycle.html (root) | ring:49 |
| 51 | [[Second_law_of_thermodynamics]] · *E51* | three | live · https://wikitube-3d-microsims.netlify.app/Second_law_of_thermodynamics.html | ring:50 |
| 52 | [[Entropy]] · *E52* | three | live · https://wikitube-3d-microsims.netlify.app/Entropy.html | ring:51 |
| 53 | [[Irreversible_process]] · *E53* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Irreversible_process.html (sibling) | ring:52 |
| | **Part VI — Conservation of energy** | | | |
| 54 | [[Conservation_of_energy]] · *E54* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Conservation_of_energy.html (sibling) | ring:53 |
| 55 | = C41 (placed) · *E55* | three | placed · same sim as C41 (owner's sim not built) | ring:54 |
| | **Part VII — Energy transfer** | | | |
| 56 | [[Heat_transfer]] · *E56* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Heat_transfer.html (root) | ring:55 |
| 57 | [[Thermal_conduction]] · *E57* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Thermal_conduction.html (sibling) | ring:56 |
| 58 | [[Convection]] · *E58* | three | live · https://wikitube-3d-microsims.netlify.app/thury/Rayleigh–Bénard_convection.html | ring:57 |
| 59 | [[Thermal_radiation]] · *E59* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Thermal_radiation.html (sibling) | ring:58 |
| 60 | [[Closed_system]] · *E60* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Closed_system.html (sibling) | ring:59 |
| 61 | [[Control_volume]] · *E61* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Control_volume.html (sibling) | ring:60 |
| 62 | [[Energy_storage]] · *E62* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Energy_storage.html (root) | ring:61 |
| 63 | [[Pumped-storage_hydroelectricity]] · *E63* | three | live · https://wikitube-3d-microsims.netlify.app/thury/Pumped-storage_hydroelectricity.html | ring:62 |
| 64 | [[Flywheel_energy_storage]] · *E64* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Flywheel_energy_storage.html (sibling) | ring:63 |
| 65 | [[Hydrogen_storage]] · *E65* | three | live · https://wikitube-3d-microsims.netlify.app/thury/Hydrogen_storage.html | ring:64 |
| | **Part VIII — Thermodynamics** | | | |
| 66 | — *Thermodynamics* · *E66* | — | none (prose) | ring:65 |
| 67 | [[Internal_energy]] · *E67* | three | live · https://wikitube-3d-microsims.netlify.app/matter/Internal_energy.html (sibling) | ring:66 |
| 68 | = C36 (placed) · *E68* | three | placed · same sim as C36 · https://wikitube-3d-microsims.netlify.app/matter/Debye_model.html | ring:67 |
| 69 | [[First_law_of_thermodynamics]] · *E69* | three | live · https://wikitube-3d-microsims.netlify.app/matter/First_law_of_thermodynamics.html (root) | ring:68 |
| 70 | = C09 (placed) · *E70* | three | placed · same sim as C09 · https://wikitube-3d-microsims.netlify.app/Kinetic_theory_of_gases.html | ring:69 |
<!-- WT:REPOP 2026-09-11 end -->
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*Repopulated 2026-09-19 · append-only · source: _tools/generate/g34_portal_section_sims.py@00a28cb2 (players of the linked articles, each URL 200-checked) · 121 added · 0 deletions*