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प्रश्न
State the speed of (i) light and (ii) sound in air?
एक पंक्ति में उत्तर
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उत्तर
(i) Speed of light in air = 3 x 108 m s-1
(ii) Speed of sound in air = 330 m s-1.
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संबंधित प्रश्न
Write true or false for a given statement.
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| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
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