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.

1,501.

The change of state from solid to liquid occurs

A.

at constant temperature

B.

when temperature is lower than the boiling point

C.

when temperature is just near freezing point

D.

when temperature is equal to the boiling point

Correct answer is A

No explanation has been provided for this answer.

1,502.

The temperature at which the water vapor in the air saturates the air and begins to condense is known as

A.

dew point

B.

critical point

C.

boiling point

D.

triple point

Correct answer is A

No explanation has been provided for this answer.

1,503.

Heat transfer by conduction is similar to wave motion because

A.

there is increase in temperature

B.

transfer of materials is involved

C.

charged particles vibrates at right angles

D.

no transfer of materials is involved

Correct answer is D

No explanation has been provided for this answer.

1,504.

A screw-jack has the distance between its successive threads as P and the length of its tommy bar as r. Its velocity ratio is given by the expression

A.

\(\frac{2 \pi r^2}{P}\)

B.

\(\frac{2 \pi r}{P}\)

C.

\(\frac{2 \pi}{rp}\)

D.

\(\frac{P}{2 \pi r}\)

Correct answer is B

No explanation has been provided for this answer.

1,505.

The S.I unit of power is

A.

N

B.

Pa

C.

W

D.

J

Correct answer is C

No explanation has been provided for this answer.