A child hears an echo from a cliff 4 seconds after the sound from a powerful cracker is produced. How far away is the cliff from the chid? Velocity of sound in the air at 20°C is 344m s^ -1

A child hears an echo from a cliff 4 seconds after the sound from a po

1.	A child hears an echo from a cliff 4 seconds after the sound from a powerful cracker is produced. How far away is the cliff from the chid? Velocity of sound in the air at 20°C is 344m s^ -1
Answer» DISTANCE between the child and the cliff be d. Then, TOTAL distance travelled by the sound = 2dTotal TIME taken by the sound = 4 sThen VELOCITY of sound This gives,Thus, the cliff at a distance of 688 m from the child.

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A child hears an echo from a cliff 4 seconds after the sound from a powerful cracker is produced. How far away is the cliff from the chid? Velocity of sound in the air at 20°C is 344m s^ -1​

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A child hears an echo from a cliff 4 seconds after the sound from a powerful cracker is produced. How far away is the cliff from the chid? Velocity of sound in the air at 20°C is 344m s^ -1