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The speed of a bullet can be determined by firing it into a block of wood...

The speed of a bullet can be determined by firing it into a block of wood and measuring the temperature change.   If you fired a 15 g bullet into a block of wood of mass 1.05 kg, and found the temperature rose by 0.02 °C, how fast would you infer the bullet was fired?     Would your assumption be an UPPER or a LOWER limit of the speed? (the heat capacity of wood is 0.4 cal/g°C)

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