Pressure - Jamb Physics Past Questions and Answers

Question 46:

• JAMB 2001

The height at which the atmosphere ceases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is

A. 380mmHg
B. 570mmHg
C. 190mmHg
D. 480mmHg

Question 47:

• JAMB 2002

The hydrostatic blood pressure difference between the head and the feet of a boy standing straight is 1.65 x 104 Nm-2. Find the height of the boy.
[ Density of blood = 1.1 x 103 kgm-3, g = 10ms-2]

A. 0.5 m
B. 0.6 m
C. 1.5 m
D. 2.0 m

Question 48:

• JAMB 2003

A hose of cross-sectional area 0.5m² is used to discharge water from a water tanker at a velocity of 60ms^-1 in 20s into a container. If the container is filled completely, the volume of the container is

A. 240m³
B. 600m ³
C. 2400m ³
D. 6000m³

Question 49:

• JAMB 2003

The stylus of a phonograph record exerts a force of 7.7 x 10^-2N on a groove of radius 10^-5m. Compute the pressure exerted by the stylus on the groove

A. 2.45 x 10⁸ Nm^-2
B. 3.45 x 10⁸ Nm^-2
C. 4.90 x 10⁸ Nm^-2
D. 2.42 x 10⁸ Nm^-2

Question 50:

• JAMB 2004

In a hydraulic press , a force of 40N is applied on the effort piston of area 0.4m². If the force exerted on the load piston is 400N, the area of the large piston is

A. 4m²
B. 8m²
C. 2m²
D. 1m²