A gun is on the same horizontal level as a target 484 meters away.  A bullet is fired from the gun with a muzzle velocity of 154m/s.  At what angle of elecation should the muzzle of the gun be set in order to ensure the bullet hits the target?

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.