Water tank bottom pressure = 3 atm. What is flow speed from hole at bottom?
Correct answer: A. 20 m/s
- A. 20 m/s
- B. 10 m/s
- C. 30 m/s
- D. None
Explanation
Gauge pressure causing flow is (3 atm − 1 atm) = 2 atm ≈ 2×1.013×10⁵ PA. v = √(2P/ρ) ≈ √(2×2.026×10⁵/1000) ≈ √405 ≈ 20.1 m/s.
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