How is hydrostatic pressure P at depth h in a liquid of uniform density rho related to depth?
Answer and explanation
Correct answer: A. P = rho g h
- Step 1: Hydrostatic pressure is the weight of the liquid column per unit cross-sectional area: (rho A h g) / A. Step 2. P = rho g h, showing linear increase with depth. Answer: P = rho g h. Why not the others:* Division by h inverts relationship; division by g inverts gravity; squared depth has incorrect units.
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