Pressure - Jamb Physics Past Questions and Answers

Question 21:

• JAMB 1985

A metal cube of volume 10³mm³ is lowered into a measuring cylinder containing water. If the internal cross-sectional area of the cylinder is 1.5 x 10²mm², by how much does the water level rise in the cylinder?

A. 6.67 x 10⁰mm
B. 8.50 x 10²mm
C. 1.15 x 10³mm
D. 2.50 x 10³mm
E. 1.50 x 10⁵mm

Question 22:

• JAMB 1985

Normal atmospheric pressure at sea-level is 10⁵Nm^-2 and the acceleration due to gravity is approximately 10ms^-1. If the atmosphere has a uniform density of 1kgm^-3, its height is

A. 100m
B. 1000m
C. 10 000m
D. 100 000m
E. 1000 000m

Question 23:

• JAMB 1986

A rectangular tank contains water to a depth of 2m, if the base is 4m x 3m, calculate the force on the base (Density of water = 10³kgm^-3, g = 10ms^-2)

A. 1.4 x 10²N
B. 24 x 10⁴N
C. 2.0 x 10⁴N
D. 1.7 x 10³N

Question 24:

• JAMB 1986

Mercury is suitable as a barometric fluid because it

A. Expands uniformly
B. Is opaque
C. Is several times denser than water
D. Is a good conductor of heat

Question 25:

• JAMB 1987

The distance between the fixed points of a centigrade thermometer is 20cm. What is the temperature when the mercury level is 4.5cm above the lower mark?

A. 22.5^oC
B. 29.0^oC
C. 90.0^oC
D. 100.0^oC