JAMB Physics Past Questions & Answers - Page 92

456.

The continuous stirring in the method of mixtures to determine the specific thermal capacity of a substance ensures

A.

continuous dissipation of heat to the room

B.

uniform distribution of thermal energy to all parts of the mixture

C.

that the thermal energy is confined to the mixture

D.

that there is rapid heat exchange

Correct answer is B

No explanation has been provided for this answer.

457.
458.

The diagram given is used to determine the

A.

boiling point of water

B.

atmospheric pressure

C.

upper fixed point of a thermometer

D.

amount of water in the atmosphere

Correct answer is C

No explanation has been provided for this answer.

459.

Which of the following statements correctly defines the boiling point of a liquid? The temperature at which the

A.

saturated vapour pressure equals the atmospheric pressure

B.

molecules leaves the liquid at a rate equal to the rate at which they return

C.

molecules leave the liquid at a rate higher than that at which they return

D.

molecules leave the liquid at a rate lower than the rate at which they return

Correct answer is A

No explanation has been provided for this answer.