Jamb Physics 1991 Past Questions and Answers

Question 11:

• 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 12:

• JAMB 1991

A pilot records the atmospheric pressure outside its plane as 63cm of Hg while a ground observer records a reading of 75cm of Hg for the atmospheric pressure on the ground. Assuming that the density of the atmosphere is constant, calculate the height of the plane above the ground. (Relative density of Hg = 13.0 and that of air = 0.00013)

A. 1200m
B. 6300m
C. 7500m
D. 13800m

Question 13:

• JAMB 1991

In which of the following is surface tension important?

A. The floating of a ship in water
B. The floating of a dry needle in water
C. The floating of a baloon in air
D. The diffusion of sugar solution across a membrane

Question 14:

• JAMB 1991

A thermometer with an arbitrary scale S, of equal division registers -30^oS at the ice point and +90^oS at the steam point. Calculate the Celsius temperature corresponding to 60^oS

A. 25.0^oC
B. 50.0^oC
C. 66.7^oC
D. 75.0^oC

Question 15:

• JAMB 1991

A brass rod is 2m long at a certain temperature. What is the length for a temperature rise of 100K, if the expansivity of brass is 18 x 10^-6K^-1?

A. 2.0036m
B. 2.0018cm
C. 2.1800
D. 2.0360m