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(lemmy.ca)
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this post was submitted on 30 Apr 2026
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No way a teacher wouldn't know this!
I mean isn't this wrong? It may be near 100% but there's never 100% conversion to a single kind of energy. For example, even if it's just a tiny faction, magnetic field convert electrical energy to kinetic energy, no?
100% of that tiny fraction still returns to heat.
Ah so we count following convertions. That clarifies things, thx.
I guess we could also say that eventually that heat will escape outdoors and be radiated back into space, a tiny fraction of that will end up on the sun, and be sent back again.
Okay so the light bulb example can be wrong. My grandpa would heat his room with a 100 watt bulb meaning both the light and the heat were useful outputs.