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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.

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1,791.

The distance between two points P and Q, along a wave is 0.05m. If the wave length of the wave is 0.10m, determine the phase angle between P and Q in radians

0.1 $\pi$

$\pi$

2 $\pi$

10 $\pi$

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

1,792.

Which of the following wave is electromagnetic?

x-rays

sound waves

water waves

tidal waves

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

1,793.

The pressure of a fixed mass of an ideal gas at 27°C is 3 pa. The gas is heated at a constant volume until its pressure is 5 pa. Determine the new temperature of the gas.

100^oC

227^oC

273^oC

500^oC

View answer & explanation

Correct answer is B

$\frac{P_1}{T_1} = \frac{P_2}{T_2} = \frac{3}{300} = \frac{5}{T_2}$

T $_2$ = 500°C

°C = 500 - 273 = 227°

1,794.

According to the kinetic theory of gasses, which of the following property of a gas can be affected by the collision of the gas molecule with the walls of the container?

temperature

energy

viscosity

pressure

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,795.

A body of mass 200g and specific heat capacity 0.4Jg^-1k^-1 cools from 37^oC to 31^oC. Calculate the quantity of the heat released by the body.

4800J

1200J

480J

202J

View answer & explanation

Correct answer is C

Q = mc $\theta$

= 200 x 0.4 x 6 = 480J

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