Which term expresses the change in pressure per unit of elevation, often expressed as psi per foot?

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Multiple Choice

Which term expresses the change in pressure per unit of elevation, often expressed as psi per foot?

Explanation:
Pressure is the quantity that varies with elevation in a static fluid, and expressing it per unit of height gives the pressure gradient (for example, psi per foot). As you move up or down in a column of water or air, the pressure changes, so the term describing that change is simply pressure. Elevation is the height itself, not the changing quantity; volume isn’t about pressure, and dynamic pressure concerns pressure from motion rather than height.

Pressure is the quantity that varies with elevation in a static fluid, and expressing it per unit of height gives the pressure gradient (for example, psi per foot). As you move up or down in a column of water or air, the pressure changes, so the term describing that change is simply pressure. Elevation is the height itself, not the changing quantity; volume isn’t about pressure, and dynamic pressure concerns pressure from motion rather than height.

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