A lead bullet, of initial temperature 27^@Cand 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 = 600 K, latent heat of fusion = 2.5 xx 10^(4)J Kg^(-1), specific heat 125 J kg^(-1)K^(-1))

A lead bullet, of initial temperature 27^@Cand speed .v.kmph pnetrates

1.	A lead bullet, of initial temperature 27^@Cand 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 = 600 K, latent heat of fusion = 2.5 xx 10^(4)J Kg^(-1), specific heat 125 J kg^(-1)K^(-1))
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