Post Utme Physics Past Questions and Answers

Question 1281:

The mode of heat transfer which does not require material medium is ____________

A. Conduction
B. Radiation
C. Convection
D. Propagation

Question 1282:

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 height of $20km$ above the ground is ____________

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

Question 1283:

A simple pendulum $0.6m$ long has a period of $1.55$, what is the period of a similar pendulum $0.4$ long in the same direction

A. $1.4\sqrt{\frac{1}{3}}$s
B. $1.5\sqrt{\frac{1}{3}}s$
C. $2.25$s
D. $1.00$s
E. $2.00$s

Question 1284:

Which of the following is common to evaporation and boiling, they ____________

A. Take place at any temperature
B. Are surface phenomena
C. Involve change of state
D, take place at a definite pressure
D. None of the above

Question 1285:

A house hold refrigerator is rated 200 watts. If electricity costs $5k$ per kwh, what is the cost of operating it for 20 days ____________

A. #4.80
B. $\mathrm{\#}48.00$
C. $\mathrm{\#}480.00$
D. $\mathrm{\#}4800.00$
E. #240.00