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 $F1$ 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 $1-5x$ ${10}^2{\mathrm{mm}}^2$ 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. ${70}^{\circ }\mathrm{C}$