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Standard IX

Physics

Speed

If the speed ...

Question

If the speed of sound in air is 340 $m s^{- 1}$ . How far does it travel in 22 seconds?

1.7 km

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2.4 km

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2.9 km

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3.4 km

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Solution

The correct option is D 3.4 km
Speed = $340 m s^{- 1}$ and time = $22 s$

Distance travelled by sound = speed of sound in air $\times$ time
Distance = $340 \times 22 = 7480 m \approx 7.5 k m$

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and in water equal to

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and in water equal to

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The sound produced by a thunderstorm is heard $10 s$ after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given speed of sound = $340 m s^{- 1}$ )

Q. A car is moving along a straight road at a steady speed. It travels

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(d) How long does it take to travel

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If the speed of sound in air is 340 ms−1. How far does it travel in 22 seconds?

The correct option is D 3.4 kmSpeed = 340ms−1 and time = 22 s Distance travelled by sound = speed of sound in air× time Distance = 340×22=7480 m≈7.5 km

If the speed of sound in air is 340 $m s^{- 1}$ . How far does it travel in 22 seconds?

The correct option is D 3.4 km
Speed = $340 m s^{- 1}$ and time = $22 s$

Distance travelled by sound = speed of sound in air $\times$ time
Distance = $340 \times 22 = 7480 m \approx 7.5 k m$