Anonymous
Anonymous asked in Science & MathematicsPhysics · 2 months ago

A 2.80-g lead bullet at 34.0°C is fired at a speed of 210 m/s into a large block of ice at 0°C, in which it becomes embedded. ?

A 2.80-g lead bullet at 34.0°C is fired at a speed of 210 m/s into a large block of ice at 0°C, in which it becomes embedded. What quantity of ice melts?

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  • Anonymous
    2 months ago

    KE + heat lost by lead = heat gained by ice

    so it depends on what you take as the specific heat of lead

    ½mv² + mcΔT = M*L

    where m = 0.00280 kg

    and c = 160 J/kg·ºC (assumed -- check your reference tables)

    ΔT = 34.0ºC

    M = mass of ice that melts

    L = 3.34e5 J/kg

    I get M = 2.30e-4 kg = 0.230 g

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