Physics questions and answers

Physics Questions and Answers

If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.

3,136.

The temperature at which the water vapour present in the air is just sufficient to saturate air is

A.

Boiling point

B.

Ice point

C.

Saturation point

D.

Dew point

Correct answer is D

No explanation has been provided for this answer.

3,137.

The melting point of a substance is equivalent to its

A.

Vapour Pressure

B.

Solidification Temperature

C.

Liquidification Temperature

D.

Solidification Pressures

Correct answer is B

No explanation has been provided for this answer.

3,138.

The quantity of heat needed to raise the temperature of a body by 1K is the body's

A.

Heat capacity

B.

Internal energy

C.

Specific heat capacity

D.

Latent heat of fusion

Correct answer is A

No explanation has been provided for this answer.

3,139.

The equation PaVbTc= constant reduces to Charles Law if

A.

a=1, b=1and c=0

B.

a=1, b=0 and c=-1

C.

a=0, b=1 and c=1

D.

a=0, b=1 and c=-1

Correct answer is D

if a=0, b=1 and c=-1 then
P0V1T-1 = V/T (Charles Law)

3,140.

What is the equivalent of 20K in Celsius scale?

A.

-253oC

B.

-293oC

C.

68oC

D.

36oC

Correct answer is A

= (20 - 273)°C

= -253°C