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A bullet of mass 4.2×10−2 kg4.2 \times 10^{-2}\,\text{kg}, moving at a speed of 300 ms−1300\,\text{ms}^{-1}, gets stuck into a block with a mass 9 times that of the bullet. If the block is free to move without any kind of friction, the heat generated in the process will be
Work, Energy and Power - Medium - Question