Pressure - Jamb Physics Past Questions and Answers

Question 71:

• JAMB 2019

A rectangular solid black has length 10cm, breadth 5cm and height 2cm. If it lies on a horizontal surface, and has density 100kg/m${}^3$, calculate the pressure it exerts on the surface.

A. 200 N/m${}^2$
B. 300 N/m${}^2$
C. 100 N/m${}^2$
D. 400 N/m${}^2$

Question 72:

• JAMB 2019

A well 1km deep is filled with a liquid of density 950kg/m${}^3$ and g = 10m/s${}^2$, the pressure at the bottom of the well is

A. 9.6 à— 10${}^6$N/m${}^2$
B. 9.5 x 10${}^5$N/m${}^2$
C. 9.4 x 10${}^6$N/m${}^2$
D. 9.5 x 10${}^6$N/m${}^2$

Question 73:

• JAMB 2019

The height at which the atmosphere cases 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
(ρm = 13.6g/cm${}^3$ ρ = 0.00013g/cm${}^3$ )

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

Question 74:

• JAMB 2020

Two divers G and H are at depths 20m and 40m, respectively below the water surface in a lake. The pressure on G is O${}_1$ while the pressure on H is P${}_2$, If the atmospheric pressure is equivalent to 10m of water, then the value of P${}_2$/P${}_1$ is

A. 0.50
B. 0.60
C. 1.67
D. 2.00