A 0.1 kg bullet fired from a rifle enters a very large body of water and comes to rest. As a result of aerodynamic drag, the bullet heats up significantly during flight; however, it cools off upon impact with the water. The flight velocity of the bullet as it enters the water is 500m/s and the entropy change of the water due to the cooling is 0.1kJ/K. Assuming the water has an avg temp of 25 degrees Celsius:
a) The temp of the bullet immediately before impact with the water given that the specific heat of the brass bullet is 0.38 kJ/kg-K. Make sure you watch your units carefully!
b) The total entropy generated by the cooling of the bullet.