Let us calculate the pressure exerted on the bottom by the weight of the fluid. Its bottom supports the weight of the fluid in it. The difference is that water is much denser than air, about 775 times as dense.Ĭonsider the container in Figure 1. You may notice an air pressure change on an elevator ride that transports you many stories, but you need only dive a meter or so below the surface of a pool to feel a pressure increase. In this case, the pressure being exerted upon you is a result of both the weight of water above you and that of the atmosphere above you. Under water, the pressure exerted on you increases with increasing depth. Also, compute the fluid force on a horizontally oriented porthole that is under 50 ft of water. Find the total fluid force exerted on each porthole. This pressure is reduced as you climb up in altitude and the weight of air above you decreases. Each vertically oriented porthole is to have a 3 ft diameter whose center is to be located 50 ft underwater. At the Earth’s surface, the air pressure exerted on you is a result of the weight of air above you. If your ears have ever popped on a plane flight or ached during a deep dive in a swimming pool, you have experienced the effect of depth on pressure in a fluid.
Calculate density given pressure and altitude.Explain the variation of pressure with depth in a fluid.
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