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A lead bullet just melts when stopped by an obstacle.Assuming that 25% of heat is absorbed by the obstacle,find velocity of bullet if its initial temperature is 27 C...............
[Melitng pt of lead=327 C , specific heat of lead=0.03 cal/g/C , latent heat of fusion of lead=6 cal/g ,J=4.2J/cal]
Answer= 410m/s
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