I was just wondering (Wondering!? Stop wasting our precious time!) about clapping my hands. *Claps* It's sound energy. A little energy is released as heat. Good. This means that I have used some energy from my body. In making those two energies. Right. <<Mentor note: rant removed>> So, I am in a vacuum. And I clap. Wonderful. I hear no sound. But does this mean that the clap sound isn't being produced at all? That is, the energy which was being converted to heat and sound is now being converted to just heat ( I understand there will be friction. Else there won't be any clap.) So, the question is: Can I clap more times in a vacuum? As energy use is reduced? Thanks for reading. Keep physicking.