Mechanical energy of the projectile-earth system
A 9.05 kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 72.5 kJ during the projectile's ascent. How much higher would the projectile have gone were air drag negligible?
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The amount of internal energy needed to raise the temperature of 0.25kg of water by 0.2C is 209.3J. How fast must a 0.25KG basebal travel in ortder for its kinetic energy to equal this internal energy?
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