Hydrostatic Pressure at Depth

Steps:

• Total pressure P = atmospheric pressure + ρ g h, where ρ is density, g is gravity (9.8 m/s²), h is depth.
• Use ρ = 1000 kg/m³ for water (correcting given g/m³ unit to standard SI kg/m³).
• Calculate hydrostatic pressure: 1000 × 9.8 × 1.0 = 9800 Pa = 9.8 kPa.
• Add to atmospheric: 101 kPa + 9.8 kPa = 110.8 kPa.

Why D is correct:

• D matches the total absolute pressure using the hydrostatic formula for incompressible fluid.

Why the others are wrong:

• A: Gauge pressure only with incorrect g or h (e.g., g=17.4 m/s²).
• B: Atmospheric minus approximate gauge pressure (101 - 14.7 ≈ 86.3).
• C: Atmospheric plus negligible addition, ignoring proper ρ.

Final answer: D