Which action best demonstrates the transformation of mechanical energy to heat energy and sound energy?
1)stretching a string
2)squeezing a sponge ball
3)throwing a ball upwards in air
4)striking a hammer on a nail
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Answer:
4. Striking a hammer on a nail
Explanation:
A tremendous amount of force is applied over a small area to generate very high stresses that are in the plastic zone.
a high amount of thermal energy is generated and the localised disturbance of the air generates audible sound
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