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10 July, 18:07

At what speed would one need to fire a lead project tile in order for its temperature to rise from 25°C to 36.9°C upon impact on a stationary object

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  1. 10 July, 19:36
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    55 m/s

    Explanation:

    If all kinetic energy is converted to heat:

    ½ mv² = mCΔT

    v = √ (2CΔT)

    v = √ (2 * 128 J/kg/K * (36.9°C - 25°C))

    v = 55.2 m/s

    Rounded to two significant figures, the speed is 55 m/s.
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