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JAMB Physics 2010 Question 14

Question 14

Density and Upthrust

A hydrometer is an instrument used in measuring

  1. A.density of liquid.
  2. B.relative density of a liquid.
  3. C.relative humidity of a liquid.
  4. D.vapour pressure of a fluid.
Show the answer and explanation

Answer: B (relative density of a liquid.)

Explanation

A hydrometer floats in a liquid and the depth it sinks to shows the liquid's relative density, read off its scale.