A fluid moves horizontally from point (1) to point (2) which is a stagnation point.  During this flow, the fluid's potential energy ... a). stays constant b). increases c).  decreases d). none

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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.