The engine room of a freighter is on fire. A fire-fighting tugboat has drawn along side and is directing a stream of water to go into the stacks of the freighter. If the speed of water jet is 20 m/sec, what angle a is needed to accomplish the task. ANS: a = deg=

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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.