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.

2,146.

The apparent weight of a body wholly immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. (Density of water = 1000kgm-3, g = 10ms-3)

A.

8.9 x 10m-3m3

B.

6.4 x 10m-3m3

C.

3.2 x 10m-3m3

D.

3.0 x 10m-3m3

Correct answer is B

No explanation has been provided for this answer.

2,148.

An iron rod is moved from the earth to the moon. Which of the following properties of the rod would remain unchanged? i. mass ii. weight iii. relative density

A.

i only

B.

ii only

C.

iii only

D.

i and iii only

Correct answer is D

No explanation has been provided for this answer.

2,149.

The diagram above illustrates three forces T1, T2 and 100N in equilibrium. Determine the magnitude of T1

A.

100 tan 30o

B.

\(\frac{100}{\cos 30^o}\)

C.

200 sin 301

D.

\(\frac{200}{tan 30^o}\)

Correct answer is A

No explanation has been provided for this answer.

2,150.

It is always not possible to determine exactly and simultaneously the position and momentum of a particle. This statement is known as the

A.

De broglie's law

B.

Heisenberg's uncertainty principle

C.

Compton effect

D.

Frank-Hertz experimental law

E.

Wave particle paradox

Correct answer is B

No explanation has been provided for this answer.