Q1 · hard · AI-verified
The pressure at the bottom of the ocean at a depth of 10 km is approximately (seawater density = 1025 kg/m³, g = 9.8 m/s², atmospheric pressure = 1.013 × 10⁵ Pa):
- ~1.0 × 10⁶ Pa
- ~1.006 × 10⁸ Pa
- ~9.8 × 10⁷ Pa
- ~1.025 × 10⁸ Pa
Q2 · hard · AI-verified
A naval sonar buoy floats with 60% of its volume submerged in seawater (density 1025 kg/m³). What is the density of the buoy material?
- 600 kg/m³
- 1025 kg/m³
- 683 kg/m³
- 615 kg/m³
Q3 · hard · AI-verified
Pascal's law is applied in the hydraulic system of a naval crane. A force of 500 N is applied on a piston of area 25 cm². What force is produced on a larger piston of area 500 cm²?
- 2,500 N
- 20,000 N
- 10,000 N
- 5,000 N
Q4 · easy · AI-verified
Water pressure at a depth 'h' in a liquid of density 'ρ' is given by the formula:
- P = gh/ρ
- P = ρ/gh
- P = ρgh
- P = ρg/h
Q5 · easy · AI-verified
A ship floats on water because its average density is ______ than the density of water.
- Less
- Equal
- Double
- Greater