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प्रश्न
Can you hear the sound produced due to the vibrations of second's pendulum?
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उत्तर
No, we cannot hear the sound produced due to the vibration of second's pendulum.
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संबंधित प्रश्न
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
Select the correct alternative :
We can distinguish a shrill sound from a flat sound by its
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)?
The sound of an explosion on the surface of a lake is heard by a boat man 100 m away and by a diver 100 m below the point of explosion.
(i) Who would hear the sound first: boatman or diver?
(ii) Give a reason for your answer in part (i).
(iii) If sound takes time t to reach the boatman, how much time approximately does it take to reach the diver?
Complete the following sentences :
Sound cannot travel through __________, but it requires a ___________.
Complete the following sentences :
Wave velocity = ________________ × wavelength.
Select the correct option:
A part of longitudinal wave in which particles of the medium are farther away than the normal particles is called :
What is a longitudinal wave?
What do you understand by the term echo?
