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JAMB Physics 1999 Question 15

Question 15

Density and Upthrust

A solid weighs 10.0 N in air, 6.0 N when fully immersed in water and 7.0 N when fully immersed in a certain liquid X. Calculate the relative density of the liquid.

  1. A.5/3
  2. B.4/3
  3. C.3/4
  4. D.7/10
Show the answer and explanation

Answer: C (3/4)

Explanation

Relative density = loss of weight in liquid ÷ loss of weight in water = (10 − 7)/(10 − 6) = 3/4.