Post Utme Physics Past Questions and Answers

Question 426:

Thermal equilibrium between two objects exist when ____________

A. The heat capacity of both objects are the same
B. One object loses heat continuously to the othe
C. Temperature of both objects are equal
D. The quantity of heat in both objects is the same.

Question 427:

A shepherd calling to fellow shepherd heard his voice reflected by a rock 3 s later.
Calculate the velocity of sound in air if the rock is 510m away.

A. 510m/s
B. 1.5 m/s
C. 340 m/s
D. 170 m/s

Question 428:

An object 3 cm high placed on the axis of a converging lens form an image 30 cm from the lens.
If the focal length of the lens is 15 cm the height of the image is ____________

A. 3 cm
B. 1 cm
C. 6 cm
D. None of the above

Question 429:

An object is placed between two plane mirrors inclined at 600 to each other.
If the object is equidistant from each find the number of images for me ____________

A. 2
B. 3
C. 4
D. 6

Question 430:

Before frying, the volume of 0.8 g/cm³ vegetable oil was 500 cm³. If the density of the oil was 0.5 g/cm³ after frying and there was no loss of oil due to spilling, what is the new volume of the oil?

A. 400 cm³
B. 800 cm³
C. 600 cm³
D. 200 cm³