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A 8.00 ? 107 kg battleship originally at rest fires a 1000 kg artillery shell horizontally...

A 8.00 ? 107 kg battleship originally at rest fires a 1000 kg artillery shell horizontally with a velocity of +675 m/s.

(a) If the shell is fired straight aft, there will be negligible friction opposing the ships recoil velocity. Calculate its recoil velocity.
  m/s
(b) Calculate the increase in internal kinetic energy (that is, for the ship and the shell). This is less than the energy released by the gun powder -- significant heat is generated.
J

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