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प्रश्न
Define sound ranging.
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उत्तर
The process by which bats and dolphins detect the presence of an obstacle by hearing the echo of the sound produced by them is called sound ranging.
संबंधित प्रश्न
On what factor does the loudness of a sound depend ?
To detect the obstacles in their path, bats produce ______.
Distinguish between longitudinal and transverse waves.
'Note' is a sound :
Fig. shows three ways in which a string of length l in an instrument can vibrate.
 |
 |
 |
| (i) | (ii) | (iii) |
- Which of the diagram shows the principle note?
- Which vibration has the frequency four times that of the first?
- Which vibration is of the longest wavelength?
- What is the ratio of the frequency of the vibration in (i) and (ii)?
Is pitch same as frequency?
A thin metal plate is placed against the teeth of cog wheel. Cog wheel is rotated at a speed of 120 rotations per minute and has 160 teeth. Calculate:
- frequency of node produced.
- speed of sound, if wavelength is 1.05 m.
- what will be the effect when the speed of cog wheel is doubled?
Two tuning forks A and B of frequencies 256 Hz and 192 Hz respectively are vibrated in air. If the wavelength of A is 1.25 m, calculate the wavelength produced by B.
Through which medium sound travels faster, iron or water? Give reason.
A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case
