Definition Of Relative Density - Physics Jamb Past Questions and Answers

Question 1 :

• JAMB 1983

If relative density of a metal is 19, what will be the mass of 20cm³ of the metal when immersed in water?

A. 380g
B. 400g
C. 360g
D. 39g
E. 180g

Question 2 :

• JAMB 1985

A uniform cylindrical block of wood floats in water with one-third of its height above the water level, in a liquid of relative density 0.8, what fraction of its height will be above the liquid level?

A. \(\frac{1}{6}\)
B. \(\frac{1}{5}\)
C. \(\frac{1}{3}\)
D. \(\frac{4}{5}\)
E. \(\frac{5}{6}\)

Question 3 :

• JAMB 1987

A cube of side 10cm and mass 0.5kg floats in a liquid with only \(\frac{1}{5}\) of its height above the liquid surface. What is the relative density of the liquid?

A. 0.125cm^-1
B. 0.250gcm^-1
C. 0.625cm^-1
D. 2.500cm^-1

Question 4 :

• JAMB 1991

The mass of a stone is 15.0g when completely immersed in water and 10.0g when completely immersed in a liquid of relative density 2.0. The mass of the stone in air is

A. 5.0g
B. 12.0g
C. 20.0g
D. 25.0g

Question 5 :

• JAMB 1992

The fig above shows the heights of two liquids X and Y when some air is sucked out of the apparatus through the pump P. The diameter of the table in X is twice That of the Tube In Y. What is the relative density of the liquid X with respect to liquid Y

A. 1/3
B. 2/3
C. 3
D. 6