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.
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?
No way a teacher wouldn’t know this!
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.
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.