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JAMB Physics 1983 Question 37

Question 37

Pressure

If the normal atmospheric pressure in a laboratory supports a column of mercury 0.76 m high and the relative density of mercury is 13.8, then the height of water column which atmospheric pressure will support in the same laboratory at the same time is

  1. A.0 m
  2. B.10 m
  3. C.13 m
  4. D.14 m
  5. E.18 m.
Show the answer and explanation

Answer: B (10 m)

Explanation

Equal pressures: hwater = 0.76 × 13.8 ≈ 10.5 m, so about 10 m.