Answer
0.0052kg
Work Step by Step
The bullet’s kinetic energy melted the ice.
$$\frac{1}{2}mv^2= Q_{melt}= m_{ice}L $$
$$ \frac{1}{2}(0.055kg)(250m/s)^2= m_{ice} (3.33\times10^5J/kg) $$
Solve for a mass of 0.0052kg.
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