A lead bullet of initial temperature 27^(@)C and speed 'V' kmph pnetrates into a solid object and melts. If 50% of the kinetic energy is used to heat it, the value of v in kmph is (for leads melting point=600K, latent heat of fusion=2.5xx10^(4)JKg^(-1), "specific heat" =125 J kg^(-1) k^(-1))

A lead bullet of initial temperature 27^(@)C and speed 'V' kmph pnetra

1.	A lead bullet of initial temperature 27^(@)C and speed 'V' kmph pnetrates into a solid object and melts. If 50% of the kinetic energy is used to heat it, the value of v in kmph is (for leads melting point=600K, latent heat of fusion=2.5xx10^(4)JKg^(-1), "specific heat" =125 J kg^(-1) k^(-1))
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