JAMB Physics Past Questions & Answers - Page 240

1,196.

Mercury is suitable as a barometric fluid because it?

A.

expands uniformly

B.

is opaque

C.

is several times denser than water

D.

is a good conductor of heat

Correct answer is C

Mercury is employed in the barometer because its density is sufficiently high for a relative short column to be obtained.

1,197.

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

Correct answer is C

No explanation has been provided for this answer.

1,198.

The specific latent heat of fusion of lead is the amount of heat required to

A.

melt lead at its melting point

B.

heat a unit mass of lead through 1oC

C.

change the state of a unit mass of lead at its melting point

D.

change the state of a unit mass of lead at its boiling point

Correct answer is C

No explanation has been provided for this answer.

1,199.

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

A.

conduction

B.

radiation

C.

convection

D.

propagation

Correct answer is B

No explanation has been provided for this answer.