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Answered

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A.An explosion occurs 40 km away. Knowing that the sound travel in air at about 340 m/s, how long will it take for the sound from the explosion to reach you?

B.How far is a lightning strike if you hear the thunderclap 4 s after you see the lightning bolt strikes?

Sagot :

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Answer:

A.An explosion occurs 40 km away. Knowing that the sound travel in air at about 340 m/s, how long will it take for the sound from the explosion to reach you?

Sound travels to me in a speed of about 340m/s. ∴ total distance/ speed = time taken for the sound to reach me. ∴ 117. 7 or 118 secs (approx) = 2mins or 1min 58 secs.

Explanation:

B.How far is a lightning strike if you hear the thunderclap 4 s after you see the lightning bolt strike.

If you count the number of seconds between the flash of lightning and the sound of thunder, and then divide by 5, you'll get the distance in miles to the lightning: 5 seconds = 1 mile, 15 seconds = 3 miles, 0 seconds = very close. Keep in mind that you should be in a safe place while counting.

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