Factors Affecting Speed of Sound

Q.

What is the relation between wavelength, frequency, and velocity?

Q. Question 19
Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is $340m{s}^{-1}$, Calculate

(i) wavelength when frequency is 256 Hz.
(ii) frequency when wavelength is 0.85 m.

Q.

Why speed of sound does not depend on pressure?

Q. Sound wave has different speed in different mediums because:

Q.

Why does the sound travel faster on a cloudy day than on a dry day?

Q. In which gas sound travels faster, hydrogen or carbon- dioxide? Give reason

Q. The apparent frequency of the whistle of an engine changes in the ratio of 6:5 as the engine passes a stationary observer. If the velocity of sound is 330 m/s, then the velocity of the engine is

1. 3 m/s
2. 30 m/s
3. 0.33 m/s
4. 660 m/s

Q. The S.I. unit of the frequency of a wave is

1. metre per second
2. per second
3. Hz
4. (b) and (c) above.

Q.

When both the listener and the source are moving towards each other, then which of the following is true regarding frequency and wavelength of the wave observed by the observer?

1. more frequency, less wavelength.

2. more frequency, more wavelength

3. less frequency, less wavength.

4. more frequency, constant wavelength.

Q.

What affects the amplitude of the sound waves.

Q.

State two properties of the medium on which the speed of sound in it depends.

Q.

Assertation(A): The velocity of sound in air increases due to the presence of moisture in it:

Reason(R): The presence of moisture in air lowers the density of air.

1. A and R are true and R is the correct explanation of A.

2. A and R true, but R is not the correct explanation of A.

3. A is true but R is false.

4. Both A and R are false.

Q.

Draw the figure depicting low amplitude and high amplitude

Q. Sound travels at a speed which is much less than the speed of light.

1. True
2. False

Q.

Suppose that you hear a clap of thunder $16.2s$ after seeing the associated lightning stroke. The speed of sound waves in air is $343m/s$ and speed of light in air is $3\times {10}^{8}m{s}^{-1}$ How far you are from the lightning stroke?

Q. Which of the following is true about the speed of sound?

1. It decreases with increase in temperature.
2. It is more in solid state as compared to the gaseous state.
3. It is the same in liquid and gaseous state.
4. It is the same in solid and gaseous state.

Q. The S.I. unit of the frequency of a wave is

1. metre per second
2. per second
3. Hz
4. (b) and (c) above.

Q.

Define the amplitude of a wave. Show it graphically. What does the amplitude of a wave describe?

Q.

Large the amplitude of vibration, louder the sound.

1. True
2. False

Q. How does speed of sound in air depend on the frequency of sound?

Q. How does the sound changes when we strike a empty bowl and a water filled bowl

Q.

Two border check posts are $4.8km$ apart. A gun is fired from one check post. The time difference between seeing the flash of gun and its sound at the second check post is $14sec$. Find the speed of sound in air.

Q. Which among the following statements is true?

1. Sound moves very slowly in the outer space.
2. Intensity of sound gets reduced in the outer space.
3. Shrillness of sound gets reduced in outer space.
4. Sound cannot propagate in outer space.

Q. How the speed of sound is connected with the density of an object

Q.

Define amplitude.

Q.

1. Temperature
2. Density
3. Humidity
4. Amplitude

Q. Statement 1: Sound can be heard on the surface of the Moon.

Statement 2: Due to high surface temperature on the Moon, the sound travels quicker on the Moon.

1. Only statement 1 is correct.
2. Only statement 2 is correct.
3. Both the statements are correct.
4. Both the statements are incorrect.

Q.

The frequency of a note with a high pitch is greater than the frequency of a note with a low pitch. Which statement about the note with high pitch is not correct?

1. It has a larger wavelength
2. It has a smaller wavelength
3. It has greater speed in air
4. It has a lower speed in air

1. Both I and II

2. Both III and IV

3. I, II and IV

4. I, III and IV

Q.

On what properties of the medium, the velocity of sound depends?

Q. How does the speed of sound change with change in amplitude of sound wave?

1. no change
2. increases with the increase in amplitude of sound wave.
3. decreases with the increase in amplitude of sound wave.
4. data insufficient