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Mechanical wave needs a medium to propagate. Sound is a mechanical wave. Which of the following statement(s) is/are true regarding sound?    i. Sound can travel in a vacuum.        ii. Sound can travel in liquid.      iii. Sound can travel in air.         iv. Sound can travel in solid​

Sagot :

Answer:

III. sound can travel in air

Explanation:

because of the sound travel in the air by the echoes