Question 38
PressureA reservoir 500 m deep is filled with a fluid of density 850 kgm−3. If the atmospheric pressure is 1.05 × 105 Nm−2, the pressure at the bottom of the reservoir is [g=10ms−2]
- A.4.36 × 106 Nm−2.
- B.4.25 × 106 Nm−2.
- C.4.72 × 106 Nm−2.
- D.4.28 × 106 Nm−2.
Show the answer and explanation
Answer: A (4.36 × 106 Nm−2.)
Explanation
Liquid pressure = hρg = 500 × 850 × 10 = 4.25 × 106 N m−2. Adding atmospheric pressure: 4.25 × 106 + 0.105 × 106 ≈ 4.36 × 106 N m−2.