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JAMB Physics 2008 Question 16

Question 16

Density and Upthrust

In the Hare's apparatus, water rises to a height of 26.5 cm in one limb. If a liquid rises to a height of 20.4 cm in the other limb, what is the relative density of the liquid?

  1. A.0.8
  2. B.1.1
  3. C.1.2
  4. D.1.3
Show the answer and explanation

Answer: D (1.3)

Explanation

Both columns are held up by the same pressure difference, so ρliquidhliquid = ρwaterhwater. Relative density = 26.5 ÷ 20.4 ≈ 1.3.