Post Utme Physics Past Questions and Answers

Question 1046:

The weight of heat energy needed to freeze one kilogramme of milk at the inversely point is known as

A. Heat energy
B. Intent heat of fusion
C. Specific latent heat of fusion
D. Specific heat capacity

Question 1047:

In a certain process 12,000 calories of Hexane is supplied to the system while the system does work \(7500 J\). Find the change in internal energy: Note I cal= \(4.184 J\)

A. \(57,708 J\)
B. \(42,708 J\)
C. \(35,208 J\)
D. 50,208J

Question 1048:

Some water is heated in a pot. The major mode(s) of the heat transfer through the water is/are by:

A. Convection
B. Conduction
C. Radiation
D. Conduction and radiation

Question 1049:

Calculate the quantity of heat required to completely convert \(20 kg\) ice at \(0^{\circ} C\) of water at the same temperature
(specific latent heat of fusion of ice \(=336 Jkg\) '

A. \(8.06 KJ\)
B. \(706 KJ\)
C. \(538 KJ\)
D. \(6.72 KJ\)

Question 1050:

An object of mass \(10 g\) requires \(20 J\) of heat energy to change its temperature by \(20^{\circ} C\). Calculate the specific heat capacity of the object.

A. \(0.1 Jg ^{-1} K ^{-1}\)
B. \(0.2 g ^{-1} K ^{-1}\)
C. \(0.4 Jg ^{-1} K ^{-1}\)
D. O