Post Utme Physics Past Questions and Answers

Question 346:

The force that causes an object to move in a circular path is called ____________

A. Centrifugal force
B. Centripetal force
C. Centre-seeking force
D. None of the above

Question 347:

A solid suspended by a piece of string is completely immersed in water. On attempting to lift the solid out of the water, the string breaks when the solid is partly out of the water. This is ____________

A. The tension in the string decreases as the solid is lifted
B. The mass of the solid has increase
C. The solid apparently weighs less whencompletely immersed in water than when partially immersed
D. Part of the solid still in water is exerting more force on the string

Question 348:

The following statements were made by some students describing what happened during and experiment to determine the melting point of solids
i. The temperature of the solid was constant until melting started
ii. The temperature of the solid rose until melting started
iii During melting, the temperature was rising
iv. During melting, the temperature was constant
v. The temperature continued to rise after all the solid had melted
vi. temperature stopped rising after the solid had melted
Which of the following gives correct statements in the right order?

A. 2,4 and 5
B. 2,3 and 6
C. 1, 3 and 6
D. 1, 3 and 5

Question 349:

When some grains of table salt were put in a cup of cold water, kept at constant temperature and left undisturbed, all the water tasted salty after some time. This is due to ____________

A. Capillary
B. Surface tension
C. Mixing
D. Diffusion

Question 350:

Given that the latent heat of fusion of ice is 80 cal/g, how much heat will change 100 g of ice at 0oC into water at the same temperature?

A. 8 kcal
B. 8 cal
C. 800 cal
D. 80 kcal