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प्रश्न
Sound can not travel in
पर्याय
solid
liquid
gas
vacuum
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उत्तर
vacuum
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संबंधित प्रश्न
An enemy plane is at a distance of 300 km from a radar. In how much time the radar will be able to detect the plane? Take velocity of radio waves as 3 x 108 ms-1
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| column A | column B |
| (A) Amplitude | (1) frequency |
| (B) Frequency | (2) amplitude |
| (C) Loudness | (3)maximum displacement on either side |
| (D) Pitch | (4) presence of other frequencies |
| (E) Waveform | (5) 1/ time period |
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(ii) Give a reason for the above observation.
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A 0.6 m long stretched wire is made to vibrate in two different modes as shown in figure
(a)
(b)
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Give a scientific reason.
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