MCQ
The internal energy of a piece of lead when beaten by a hammer will :
- ✓Increase
- BDecrease
- CRemain constant
- DSometimes increases and sometimes decreases
✓
Answer
Correct option: A.
Increase
When beaten by a hammer the material heats up due to the impact.
As the work done by this heat is zero there is a net increase in internal energy.
As the work done by this heat is zero there is a net increase in internal energy.
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