Which of the following is true about how pressure varies with depth in a fluid? a. pressure decreases with depth because it must support the fluid weight above it. b. pressure increases with depth because it must support the fluid weight above it. c. pressure decreases with depth because it is supported by the fluid weight below it. d. pressure increases with depth because it is supported by the fluid weight below it.

B. Pressure increases with depth because it must support the fluid weight above it.

Explanation:

The pressure is the force per unit area exerted on a body, this is the force that acts on the surface of a body and its applied perpendicular to the plane. The pressure is related to depth with the expression below;

p=ρgh 1

where p is the pressure

ρ is the density f the fluid

g is the specific gravity

h is the depth

From equation 1 pressure is directly proportional to depth, an increase in pressure is caused by an increased depth and a decrease in pressure is experienced when there is a decrease in depth.

When an object in fluid moves down, the pressure acting on the surface of the object increases, this is because the weight of the fluid acts on the object as it goes down. On the other hand, an object coming out of fluid is relieved off the weigh of the fluid, thus a decrease in pressure.

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