A lead bullet at 320K is stopped by a sheet of steel so that it reaches its melting point of 600K and completely melts If 80% of the k.e of the bullet is converted into internal energy calculate the speed with which the bullet hits the stee sheet.
Specific heat capacity of lead = 0.12kJ/kg K
Specific latent heat of fusion is 21kJ/kg
The Attempt at a Solution
i have just started this class so i am a newbie to all of this i tired EK=1/2mv^2 but im having trouble with it