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The pressure on an object increases with depth because there is more pushing on it. For example, four feet below the surface of water, there is a layer of water four feet thick pushing on the object and the water around it. Now several miles down, this layer of water is much thicker, and so exerts more pressure when it is pushing down. In this example I used water, but the same can be applied to any fluid, including air.

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14y ago

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