Post Utme Abia State University Physics Past Questions and Answers

Question 16:

Two drivers \(\mathrm{G}\) and \(\mathrm{H}\) are at depths
\(20 \mathrm{~m}\) and \(40 \mathrm{~m}\) respectively below the water surface in a lake. The pressure on \(G\) is'P. while the pressure on \(\mathrm{H}\) is \(\mathrm{P} 2\). If the atmospheric pressure is equivalent to \(10 \mathrm{~m}\) of water, the value of \(\mathrm{P} / \mathrm{P} 1\) is ____________

A. \(0.50\)
B. \(0.60\)
C. \(1.67\)
D. \(2.00\)
E. \(3.00\)

Question 17:

The areas of the effort and load pistons of a hydraulic press are \(0.5 \mathrm{~m}\) and \(5 \mathrm{~m}\) respectively. If a force \(F 1\) of \(100 \mathrm{~N}\) is applied on the effort piston, the force F20 in the load is ____________

A. \(10 \mathrm{~N}\)
B. \(100 \mathrm{~N}\)
C. \(500 \mathrm{~N}\)
D. \(1000 \mathrm{~N}\)
E. \(5000 \mathrm{~N}\)

Question 18:

A metal cube of volume \(10 \mathrm{~mm}^{3}\) is lowered into a measuring cylinder. containing water. If the Internal crosssectional area of the cyllinder is \(1-5 x\) \(10^{2} \mathrm{~mm}^{2}\) by how much does the water level rise in the cylinder?

A. \(6.67 \times 10^{3} \mathrm{~mm}\)
B. \(8.50 \times 10^{2} \mathrm{~mm}\)
C. \(1.15 \times 10^{3} \mathrm{~mm}\)
D. \(2.50 \times 10^{3} \mathrm{~mm}\)
E. \(1.50 \times 10^{5} \mathrm{~mm}\)

Question 19:

A uniform cylindrical block of wood floats in water with one-third of Its height above the water. In a llquid of relatlve density \(0.8\). what fractlon of Its helght will be above the liquid level?

A. \(1 / 6\)
B. \(1 / 5\)
C. \(1 / 3\)
D. \(4 / 5\)
E. \(5 / 6\)

Question 20:

A quantity of gas occupled a certain volume when the temperature is \(73^{\circ} \mathrm{C}\) and the pressure is increased to \(4.5\) atmospheres the volume is halved at the same time, what will be the new temperature of the gas?

A. \(573^{\circ} \mathrm{C}\)
B. \(327^{\circ} \mathrm{C}\)
C. \(56^{\circ} \mathrm{C}\)
D. \(50^{\circ} \mathrm{C}\)
E. \(70^{\circ} \mathrm{C}\)