A diver descends to a depth of 20 m in fresh water (density = 1,000 kg/m^3). Taking atmospheric pressure P0 = 1.0 x 10^5 Pa and g = 10 m/s^2, what is the absolute hydrostatic pressure experienced by the diver?
Answer and explanation
Correct answer: D. 3.0 x 10^5 Pa
Absolute pressure at depth h is given by P = P0 + rho g h. The gauge pressure is rho g h = (1,000 kg/m^3) (10 m/s^2) (20 m) = 2.0 x 10^5 Pa. Adding atmospheric pressure: P = 1.0 x 10^5 Pa + 2.0 x 10^5 Pa = 3.0 x 10^5 Pa (approx 3 atmospheres).
Practise more Classical Mechanics, Fluids, Thermodynamics, and Waves.
Free questions with an explanation for every one, and full timed Toelatingsexamen Arts & Tandarts België (Medical & Dental Entrance Exam) mock tests.
More Classical Mechanics, Fluids, Thermodynamics, and Waves questions
- A car accelerates uniformly from rest to a speed of 20 m/s over a distance of 100 m on a straight road. What is the acceleration of the car?
- A projectile is launched from ground level with an initial velocity of 40 m/s at an angle of 30° above the horizontal. Assuming g = 10 m/s^2…
- A 5.0 kg crate is pushed across a horizontal floor by a constant horizontal force of 30 N. If the coefficient of kinetic friction between th…
- A spring with a force constant k = 200 N/m is compressed by 0.10 m from its equilibrium length. How much elastic potential energy is stored…
- A 2.0 kg block is released from rest from a height of 20 m on a frictionless curved ramp. Taking g = 10 m/s^2, what is the speed of the bloc…
- An electric motor lifts a 100 kg elevator cab vertically upward at a constant speed of 2.0 m/s. Taking g = 10 m/s^2, what mechanical power d…