Sound travels at a speed of 330 m/s. If a lightning bolt strikes the ground 3 km away from you, how long will it take for the sound to reach you?

The time required for the sound to reach it's destination is 9.1 secs

The parameters given in the question are

speed= 330 m/s

distance= 3km

convert to meters

3×1000

= 3000 meters

Speed= distance/time

330= 3000/time

cross multiply

time= 3000/330

= 9.1 seconds

Hence the time is 9.1 seconds

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9.09 seconds

Explanation:

Given that,

speed of sound = 330 m/s

Distance away = 3 km

(since the SI unit of distance is metres, convert 3km to metres

1km = 1000 metres

3km = (3 x 10000) = 3000 metres

Time it take for the sound to reach you = ?

Now, recall that speed is obtained by dividing distance travelled by the time taken.

i.e speed = distance / time

330 m/s = 3000 m / time

Time = 3000 m / 330 m/s

Time = 9.09 seconds

Thus, it will take 9.09 seconds for the sound to reach you.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

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