A lead bullet just melts when stopped by an obstacle. Assuming that 2/7 th of the heat of absorbed by the obstacle. IF initial temperature is 27°C, melting point lead is 327°C, specific heat 0.03 cal/gm°C, latent heat of fusion of lead=6cal/gm and J=4.2J/cal, velocity of that bullet is

A lead bullet just melts when stopped by an obstacle. Assuming that 2/

1.	A lead bullet just melts when stopped by an obstacle. Assuming that 2/7 th of the heat of absorbed by the obstacle. IF initial temperature is 27°C, melting point lead is 327°C, specific heat 0.03 cal/gm°C, latent heat of fusion of lead=6cal/gm and J=4.2J/cal, velocity of that bullet is
Answer» `42 "ms"^(-1)` `21 "ms"^(-1)` `210 "ms"^(-1)` `420 "ms"^(-1)` Answer :D