You are standing next to a railing. The railing is 7,700 m long and is made of steel. Your friend is at the other end of the railing, and he hits the railing with a hammer. How long will it take for the sound to get to you through the railing?

Less than 1 s

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Between 1 s and 2 s

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Between 2 s and 3 s

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More than 3 s

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Solution

The correct option is B Between 1 s and 2 s
Between 1 s and 2 s; Sound travels 5960 m through steel in 1 s. Therefore, the sound will take between 1 sand 2 s to travel through the 7,700 m rail.

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You are standing next to a railing. The railing is 7,700 m long and is made of steel. Your friend is at the other end of the railing, and he hits the railing with a hammer. How long will it take for the sound to get to you through the railing?

The correct option is B Between 1 s and 2 sBetween 1 s and 2 s; Sound travels 5960 m through steel in 1 s. Therefore, the sound will take between 1 sand 2 s to travel through the 7,700 m rail.

The correct option is B Between 1 s and 2 s
Between 1 s and 2 s; Sound travels 5960 m through steel in 1 s. Therefore, the sound will take between 1 sand 2 s to travel through the 7,700 m rail.