Hydrostatic pressure formula

Steps:

• Recall the formula for pressure due to a fluid: P = ρgh, where ρ is density, g is gravitational field strength, and h is depth.
• Identify given values: ρ = 1000 kg/m³, g = 9.8 N/kg, h = 5.0 m.
• Substitute into the formula: P = 1000 × 9.8 × 5.0 Pa.
• Calculate if needed, but the expression matches option B.

Why B is correct:

• It directly applies the hydrostatic pressure formula P = ρgh, giving the gauge pressure at depth h.

Why the others are wrong:

• A omits g, ignoring the role of gravity in pressure.
• C uses only depth as pressure, which is incorrect without density and gravity.
• D multiplies density by g but forgets depth, underestimating pressure.

Final answer: B