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.

1,956.

Which of the following concept is not an evidence of the particle nature of matter?

A.

diffusion

B.

brownian motion

C.

diffraction

D.

crystallization

Correct answer is D

No explanation has been provided for this answer.

1,957.

The bar magnet illustrated in the diagram above picks up an unmagnetised steel nail X. In turn, X picks up a similar nail Y and so on. The nail are said to be magnetised by

A.

conduction

B.

single touch

C.

induction

D.

divided touch

Correct answer is C

No explanation has been provided for this answer.

1,958.

The diagram above represent displacement D, versus time, t graph of a progressive wave. Deduce the frequency of the wave

A.

20 Hz

B.

10 Hz

C.

5 Hz

D.

4 Hz

Correct answer is B

No explanation has been provided for this answer.

1,959.

Calculate the change in volume when 90g of ice is completely melted. [density of water = 1g cm-3, density of ice = 0.9cm-3]

A.

0.00cm3

B.

9.00cm3

C.

10.00cm3

D.

90.00cm3

Correct answer is C

\(\Delta\)y = Vice - Vwater

= \(\frac{90}{0.9} - \frac{90}{1} = 10cm^3\)

1,960.

An object weighs 60.0N in air, 48.2N in a certain liquid X, and 44.9N in water, Calculate the relative density of X

A.

3.300

B.

1.279

C.

0.932

D.

0.782

Correct answer is D

R.d = Wt in Air-Wt in Air-Wt in water

= \(\frac{60.0 - 48.2}{60.0 - 44.9}\)

= 0.782