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प्रश्न
Fill in the blank.
________ produces a sensation in ears.
रिकाम्या जागा भरा
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उत्तर
Sound produces sensation in ears.
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संबंधित प्रश्न
Write true or false for a given statement.
The frequency is measured in hertz.
Fill in the blank.
The pitch of a sound depends on its ________.
| 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 |
Draw a graph between displacement from mean position and time for a body executing free vibrations in vacuum.
Define the term intensity of a sound wave. State the unit in which it is measured.
Give two applications of supersonics.
What do you understand by the term sound energy?
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 |
A sound wave travels 2000 m in 8 s. What is the velocity of the sound?
Why is a sound wave called a longitudinal wave?
