Heating by Bending
Most recent answer: 12/25/2015
- Himadri (age 60)
Orange, Ct, USA
Your ideas are basically right. I would not, however, say that heat is "caused by the motion/vibration of atoms/molecules". In typical solids, thermal energy mostly is "the motion/vibration of atoms/molecules".
Here's one way to think of how the energy flows from bending to heat. As you say, when you bend the rod atoms ae forced into positions of higher energy. There are some deformations, little cracks, extra atoms crammed into places where they don't fit well, etc. As the atoms jiggle around, they tend to fall back to low energy positions. The energy that is released rattles around as little sound waves- "the motion/vibration of atoms/molecules" or "heat". Most of this process goes on during the bending, but a little bit goes on afterwards because some of the defects are long-lasting.
Mike W.
(published on 12/25/2015)