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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 |
जोड्या लावा/जोड्या जुळवा
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उत्तर
| Column A | Column B |
| (a) Vibrations cause | (3) sound |
| (b) A shriller sound is | (4) of high pitch |
| (c) Unit of frequency | (5) hertz |
| (d) Unit of time period | (2) second |
| (e) Curtains | (1) absorb sound |
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संबंधित प्रश्न
Fill in the blank.
The number of times a body vibrates in one second is called its ______.
What are longitudinal waves and transverse waves? Explain with the help of labelled diagrams.
Fig. shows three ways in which a string of length l in an instrument can vibrate.
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 |
 |
| (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)?
A girl claps and hears the echo after reflection from a cliff which is 660 m away. If the velocity of sound is 330 ms-1, calculate the time taken for hearing the echo.
Define the term wavelength applied to a sound wave.
Complete the following sentence :
Sound is produced by a ___________ body.
Answer the following question :
Can sound travel in vacuum?
State the relation between the wavelength and the frequency.
Rapid back and forth motion of a particle about its mean position is called _____.
Waves created by Earth Quake are Infrasonic.
