Advertisements
Advertisements
Question
A list of mediums is given below.
- wood
- water
- air
- vacuum
In which of these mediums can sound travel?
Options
i & ii only
i, ii & iii only
iii & iv only
ii, iii & iv only
Advertisements
Solution
i, ii & iii only
Explanation:
Sound requires any medium to travel but in vacuum there is no medium, so sound cannot travel through them.
APPEARS IN
RELATED QUESTIONS
'Note' is a sound :
The separation between two consecutive crests in a transverse wave is 100 m. If wave velocity is 20 m s-1, find the frequency of wave.
What do you mean by the audible range of frequency?
The distance between three consecutive crests of wave is 60 cm. If the waves are produced at the rate of 180/ min, calculate:
- wavelength
- time period
- wave velocity.
he sound of an explosion on the surface of a lake is heard by a boatman 120 m away and by a diver 120 m below the point of explosion. Out of the two persons, who would hear the sound first? Why?
Explain how the principle of echo is used by the dolphin to locate small fish as its prey.
Match the following.
| Ultrasonics | Frequency below 20Hz |
| Speed of sound in air | Needs material medium |
| Infrasonics | 330ms-1 |
| Sound propagation | Frequency more than 20000 Hz |
Sound travels in air:
Describe with diagram, how compressions and rarefactions are produced.
The sound produced by a thunderstorm is heard 10 s after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given the speed of sound = 340 m s–1.)
