A 5-g coin is dropped from a 300-m building. If it reaches a terminal velocity of 45 m/s, and the rest of the energy is converted to heating the coin, what is the change in temperature (in °C) of the coin? (The specific heat of copper is 387 J/kg?°C.)
A. 9
B. 2
C. 5
D. 21
E. 0.5
Answer: C
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