If the sound speed in water is 1480 m/s. Calculate the minimum distance to hear echo in water.

54 m

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64 m

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74 m

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84 m

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Solution

The correct option is C 74 m

Echo can be heard when the minimum time delay between original sound and reflected sound is 0.1 second.

Sound would travel back and forth after striking the surface. Hence, the minimum distance would be half of the distance travelled by sound in 0.1 s.

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If the sound speed in water is 1480 m/s. Calculate the minimum distance to hear echo in water.​

The correct option is C 74 m​ Echo can be heard when the minimum time delay between original sound and reflected sound is 0.1 second.​ Sound would travel back and forth after striking the surface. Hence, the minimum distance would be half of the distance travelled by sound in 0.1 s.​

If the sound speed in water is 1480 m/s. Calculate the minimum distance to hear echo in water.

The correct option is C 74 m

Echo can be heard when the minimum time delay between original sound and reflected sound is 0.1 second.

Sound would travel back and forth after striking the surface. Hence, the minimum distance would be half of the distance travelled by sound in 0.1 s.