Liquids At Rest - Jamb Physics Past Questions and Answers

Question 21:

• JAMB 1994

The mass of a specific gravity bottle is 15.2g when it is empty. it is 24.8g when filled with kerosene and 27.2g when filled with distilled water. Calculate the relative density of kerosene

A. 1.25
B. 1.10
C. 0.90
D. 0.80

Question 22:

• JAMB 1994

If a solid X floats in liquids P of relative density 2.0 and in liquid Q of relative density 1.5, it can be inferred that the

A. Weight of P displaced is greater than that of Q
B. Weight of P displaced is less than that of Q
C. Volume of P displaced is greater than that of Q
D. Volume of P displaced is less than that of Q

Question 23:

• JAMB 1995

A piece of wood floats inside water at room temperature with a fraction of it above the liquid surface. As the temperature of the water is raised, the part of the wood above the liquid will

A. Decrease because the density of water decreases with temperature
B. Increase because the density of water decreases with temperature
C. Decreases because the density of water increases with water temperature
D. Increase because the density of water increases with temperature

Question 24:

• JAMB 1997

A cube of sides 0.1m hangs freely from a string. What is the upthrust on the cube when totally immersed in water? [density of water is 1000kgm^-2, g = 10ms^-2]

A. 1000 N
B. 700 N
C. 110 N
D. 10 N

Question 25:

• JAMB 1997

An empty 60 litre petrol tank has a mass of 10kg. Its mass when full of fuel of relative density 0.72 is

A. 7.2kg
B. 33.2kg
C. 43.2kg
D. 53.2kg