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Assertion: The pressure at the bottom of the sea is lesser than that near the surface. Reason: The pressure exerted by a liquid depends upon the depth of the liquid and density of the liquid.

Question

Assertion: The pressure at the bottom of the sea is lesser than that near the surface. Reason: The pressure exerted by a liquid depends upon the depth of the liquid and density of the liquid.

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Solution

The assertion is incorrect while the reason is correct. The pressure at the bottom of the sea is greater, not lesser, than that near the surface. This is because pressure in a fluid, such as water, increases with depth. This is due to the weight of the water above pushing down on the water below. The deeper you go under the sea, the greater the pressure of the water pushing down. This is directly related to the reason given - the pressure exerted by a liquid does indeed depend on the depth of the liquid and the density of the liquid. The greater the depth, the greater the pressure. The greater the density of the liquid, the greater the pressure. Therefore, the pressure is greatest at the bottom of the sea.

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As an object's depth below the surface of a body of salt water increases, so does the pressure acting on the object due to atmospheric and water conditions. The rate at which pressure increases is approximately   pounds per square inch   for every increase in depth of   feet  . The pressure at the surface of the water is  . Rounded to the nearest foot, at what depth will the pressure acting on the object be  ?

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