From what height (in km) must a tin ball fall so that it completely melts when it hits the surface? Assume that 50% of the ball's energy goes to heating and melting. The initial temperature of the ball is 32°C. The melting point of tin is 232°C, its specific heat capacity is 200 J/(kg*K), and its specific heat of fusion is 58 kJ/kg. g = 9.8 m/s2.
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