Question

A construction worker's helmet slips and falls when he is 78.4m above the ground.
He hears the sound of the helmet hitting the 4.23 seconds after it slipped . Find the speed of sound in air.

Answer 1

Answer:

A construction worker's helmet slips and falls when he is 78.4m above the ground.

He hears the sound of the helmet hitting the 4.23 seconds after it slipped . Find the speed of sound in air.

Explanation:

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