What is the static head pressure of a 20' column of water?

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Multiple Choice

What is the static head pressure of a 20' column of water?

Explanation:
Static head pressure is the pressure produced by the weight of a fluid column. It equals the fluid’s weight density times the height of the column. For water, the weight density is about 62.4 lb/ft^3. A 20-ft column yields 62.4 × 20 = 1,248 lb/ft^2. Convert to psi by dividing by 144 (in^2 per ft^2): 1,248 / 144 ≈ 8.7 psi. In many practical problems this is rounded to about 9 or 10 psi, so the closest option is 10 psi. The other values (5, 15, 20 psi) are farther from the calculated pressure.

Static head pressure is the pressure produced by the weight of a fluid column. It equals the fluid’s weight density times the height of the column. For water, the weight density is about 62.4 lb/ft^3. A 20-ft column yields 62.4 × 20 = 1,248 lb/ft^2. Convert to psi by dividing by 144 (in^2 per ft^2): 1,248 / 144 ≈ 8.7 psi. In many practical problems this is rounded to about 9 or 10 psi, so the closest option is 10 psi. The other values (5, 15, 20 psi) are farther from the calculated pressure.

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