Post Utme Physics Past Questions and Answers

Question 311:

Which of the following has the highest surface tension?

A. Soapy water
B. Cold water
C. Warm water
D. Salt water

Question 312:

A truck traveling with a velocity of 40m/s applies the brakes and comes to a halt after 20s. What is the distance travelled by the truck before coming to a halt

A. 40m
B. 800m
C. 400m
D. 10m

Question 313:

If the linear expansivity of a metal rod is 4 x 10-5 per ˚C, what will be the new length of the rod if it is heated from 15°C to 95°C from its original length of 20cm.

A. 0.064cm
B. 0.64cm
C. 20.64cm
D. 20 064cm

Question 314:

44kJ heat was used in raising the temperature of 2kg of paraffin oil from 360k to 370k. Calculate the specific head capacity of paraffin oil.

A. 2.2J/kg/K
B. 2.2 x 103J/kg/K
C. 2.2 x 105J/kg/K
D. 220J/kg/K

Question 315:

A simple machine overcomes a load 4000N when a force of 200N is applied. If the velocity ratio of the machine is 25, calculate the efficiency of the machine.

A. 1.25%
B. 80%
C. 125%
D. 0.8%