Physics GK 16 - Sound Waves

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1.
Speed of sound is maximum in which among the following?
2.
When a tubelight breaks, a cracking sound is produced because ____?
3.
Which among the following is true regarding Sound Waves?
4.
Which among the following principle is used by Bats?
5.
Which of the following waves can be used to measure the speed of a approaching car?

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