calculate the pressure exerted by the block if it weighs 1500n. if the block rests on the base area dimensions 15m×25m. will the pressure be exerted be the same as first case? give reason for your answer
Answers
Answer:
By the end of this section, you will be able to:
Define pressure in terms of weight.
Explain the variation of pressure with depth in a fluid.
Calculate density given pressure and altitude.
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. At the Earth’s surface, the air pressure exerted on you is a result of the weight of air above you. This pressure is reduced as you climb up in altitude and the weight of air above you decreases. Under water, the pressure exerted on you increases with increasing depth. 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. 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. The difference is that water is much denser than air, about 775 times as dense.