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.

3,116.

A glass bottle of initial volume 2 x 104 cm3 is heated from 20oC to 50oC. If the linear expansivity of glass is 9 x 10-6K-1, the volume of the bottle at 50oC is

A.

20016.2cm3

B.

20005.4cm3

C.

20008.1cm3

D.

20013.5cm3

Correct answer is A

\(\gamma = \frac{V_2 - V_1}{V(\theta)}\)

\(3(9 \times 10^4) = \frac{V_2 - 2 \times 10^4}{2 \times 10^4(30)}\)

V2 - 2 x 104 = 2 x 104 (30) x 3 (9 x 10-6)


V2 = 2 x 104 2 x 104 (30) x 3 (9 x 10-6)


V2 = 16.2 + 2 x 104

V2 = 20016.2cm3

3,117.

What type of reaction is represented by the equation \(^{2}_{1}X+^{2}_{1}X\rightarrow^{3}_{2}Y+^{1}_{0}n+Energy\)

A.

Ionization

B.

Fusion

C.

Fission

D.

Chain

Correct answer is B

No explanation has been provided for this answer.

3,118.

When \(^{210}_{82}Pb\) decays to \(^{206}_{80}Pb\), it emits

A.

two alpha and two beta particles

B.

an alpha particle

C.

one beta particle

D.

one alpha and one beta particle

Correct answer is B

No explanation has been provided for this answer.

3,119.

Which of the following is NOT a Fundamental S.I unit?

A.

Metre

B.

Ampere

C.

Newton

D.

Second

Correct answer is C

No explanation has been provided for this answer.

3,120.

Which gas produces a red coloured light in a discharge tube?

A.

Mercury

B.

Argon

C.

Air

D.

Neon

Correct answer is D

No explanation has been provided for this answer.