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Category: Sound
Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen, why?
Class 9
Physics
Sound
15/03/2022
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Which characteristic of the sound helps you to identify your friend by his voice while sitting with others in a dark room?
Sound
Class 9
Physics
15/03/2022
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Why is sound wave called a longitudinal wave?
Class 9
Physics
Sound
15/03/2022
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Cite an experiment to show that sound needs a material medium for its propagation.
Class 9
Physics
Sound
14/03/2022
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Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound.
Class 9
Physics
Sound
14/03/2022
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What is sound and how is it produced?
Sound
Class 9
Physics
14/03/2022
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A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?
Class 9
Physics
Sound
14/03/2022
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What is the range of frequencies associated with (a) Infrasound? (b) Ultrasound?
Class 9
Physics
Sound
14/03/2022
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What is the audible range of the average human ear?
Sound
Class 9
Physics
14/03/2022
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Why are the ceilings of concert halls curved?
Sound
Class 9
Physics
14/03/2022
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An echo is heard in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m s–1?
Class 9
Physics
Sound
13/03/2022
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In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?
Class 9
Physics
Sound
13/03/2022
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