Liquids At Rest - Jamb Physics Past Questions and Answers

Question 51:

• JAMB 2012

A copper cube weighs 0.25 N in air, 0.17N when completely immersed in paraffin oil and 0.15 N when completely immersed in water.The ratio of upthrust in oil to upthrust in water is

A. 3 : 5
B. 4 : 5
C. 7 : 10
D. 13 : 10

Question 52:

• JAMB 2013

A piece of cork floats in a liquid. What fraction of its volume will be immersed in the liquid?
[Density of the cork = 0.25 x 10³kgm^-3, Density of the liquid = 1.25 x 10³kgm^-3]

A. 0.8
B. 0.5
C. 0.2
D. 0.1

Question 53:

• JAMB 2013

What volume of alcohol will have same mass as 4.2m^-3 of petrol?
Density of alcohol = 8.4 x 10²kgm^-3, density of petrol =7.2x10³kgm^-3

A. 0.8m³
B. 1.4m³
C. 3.6m³
D. 49.m³

Question 54:

• JAMB 2015

Body floats in fluid when its .....................

A. Displaces its own volume of the liquid (fluid)
B. Displaces its own mass of the fluid
C. Displace its own density of the fluid
D. Is no longer subjected to gravity

Question 55:

• JAMB 2016

The relative density of a liquid is the ratio of the

A. Mass of water to the mass of an equal volume of liquid
B. Upthrust in the liquid to the upthrust in water
C. Density of water to the density of the liquid
D. Upthrust in water to the upthrust in the liquid