Propagation of Sound

Q. Why does sound wave travel the fastest in solids?

Q. Sound travels faster in summer season than in winter season.

1. 
   True
2. 
   False

Q. Sound waves cannot travel in vacuum.

1. True
2. False

Q.

Answer in short ?

If there is explosion on the moon, would it be heard on earth? if not why ?

Q.

One complete crest or one complete trough makes one complete wave.

1. False

2. True

Q. Sound can travel as both longitudinal and transverse waves in .

1. solids
2. liquids
3. gases

Q. In a sound wave, compression is the region of the .

1. high pressure
2. low density
3. low pressure

Q.

Name one factor which affects the frequency of sound emitted due to vibration in an air column.

Q.

We can hear the sound produced by a meteorite strike on the moon's surface.

1. Solid

2. Gas

Q.

If the distance between the source and listener increases, the loudness of sound

1. Decreases

2. Increases

3. Remains same

Q.

The speed of sound does not depend on the properties of the medium through which it travels.

1. True

2. False

Q.

Speed of sound depends upon which parameters?

Q.

What should be the minimum time gap between two sounds to be perceptible by the human ear?

1. 1 s

2. 0.1 s

3. 0.01 s

4. 0.001 s

Q. If you place your ear close to an iron railing and your friend taps it some distance away, you hear the sound twice.Why is it so?

Q.

The speed of sound is different in different media.

1. True

2. False

Q.

When a train is approaching from a fair distance, we hear multiple sounds i.e on through track and another through the air.

1. False

2. True

Q.

Does the loudness of a sound depend on the sensitivity of a listeners ear?

Q. In a sound wave, compression is a region of:

1. High pressure
2. Low pressure
3. No pressure
4. Atmospheric pressure

Q.

Imagine you are cruising in outer space in a spaceship when you notice an asteroid hurting towards your ship. You fire a missile and score a direct hit. The asteroid explodes into a billion pieces. Would you hear the explosion? Explain your answer.

Q.

The vibration of a metal strip in air _____

1. create compressions and rarefactions

2. create alternate low and high pressure regions

3. creates only high pressure region

4. create crests and troughs

Q. How does objects absorb sound?

Q.

The main reason why we have two ears is:

1. to determine the direction from which sound is coming

2. to improve the quality of sound

3. to serve as a backup if one ear is damaged

4. to increase pitch of sound

Q.

if you place your ears close to an iron railing and your friend taps it at some distance away you hear the sound twice why is it so

Q. Match the following regions of a slinky with its corresponding representation of the wave.

1. Crest of the wave
2. Trough of the wave
3. One full wave

Q.

The waveform representation converts ____

1. the pressure variations of sound waves into a line graph

2. the volume variations of sound waves into a pictorial graph

3. the tempreature variations of sound waves into a pictorial graph

4. the pressure variations of sound waves into a pictorial graph

Q.

Sound waves always behave as a longitudinal waves.

1. True

2. False

Q. Elastic waves need material medium for their propagation.

1. True
2. False

Q. If there is an explosion on the moon, can a person standing at some distance hear the sound?

1. Yes
2. No

Q.

If the density of air molecules is more in the given region, then it is a rarefaction.

1. True

2. False

Q. We have two ears purposely to predict the of sound.

1. position of source
2. loudness of source
3. type of source