system
Given the following post, respond as if you're commenting on Reddit:
human
If you use a power tool in a vacuum, where does the extra energy that would usually be expelled as sound go?

I don't know if I have worded that correctly. In a vacuum there would be no air for the sound to make waves in so there would be no sound. But where does that energy go? It can't just disappear so it must go somewhere.  

This could also be a very stupid and obvious question. Thanks.
gpt
Heat, mostly. Although even loud noises don't usually correspond to a lot of thermal energy. 

Power tools also tend to have fan bits to cool them, plus ordinary conduction/natural convection to the air. In a vacuum, where they can only lose heat through radiation, they'd be likely to overheat. (Which is an issue with satellites and such)