I know that moving my arm requires energy, and energy is not created or destroyed. I know the energy isn’t just disappearing but I know it’s not in my body still because I can run out of energy. Where does the energy I lose go?
In: Biology
Mostly heat. Moving your arms isn’t a ridiculous amount of energy but it does take some. It’s why eventually if you start moving too much you’ll start sweating. You’re body is trying to lost the heat it gained by the movement and friction. Another minor source is the friction you cause with the air when you move your arms through it. All the small actions transfer energy to other things . It’s not lost, just transferred.
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