Read the following statements carefully.
Statement 1: Sound does not require any medium for its propagation.
Statement 2: Sound is produced from a vibrating body.
Statement 3: When a source of sound vibrates, it creates a periodic disturbance in the medium near it.
Statement 4: The speed of sound is constant in solids, liquids and gases.
Which of the following statements are correct ?
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Answer:
1,2,3 are correct but I guess I am not sure about 4 th one