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Question

Two balls at the same temperature collide. What is conserved?

A
momentum
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B
kinetic energy
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C
velocity
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D
temperature
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Solution

The correct option is A momentum
Due to the impact or the impulsive force velocities of balls change and hence total K.E. , being a scalar quantity, also changes. While momentum being vector is conserved in collision.
The loss of K.E. in impact is responsible for change in temperature.

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