While attending a large fireworks event with music, you decide to stay 1 kilomet
ID: 2040835 • Letter: W
Question
While attending a large fireworks event with music, you decide to stay 1 kilometer away because of the crowds. However you have a good view, and you can still hear the booms, as well as the music. Given a speed of sound on a warm moist summer night of 340 m/s, select those that apply.
The booms follow the flashes you see by about 3 seconds.
The booms are so loud they occur at the same time as the flash of fireworks explosion.
The music is out of phase with the fireworks and occurs about 6 seconds early
The music is out of phase with the fireworks and occurs about 3 seconds late.
The booms follow the flashes you see by about 3 seconds.
The booms are so loud they occur at the same time as the flash of fireworks explosion.
The music is out of phase with the fireworks and occurs about 6 seconds early
The music is out of phase with the fireworks and occurs about 3 seconds late.
Explanation / Answer
time taken by sound wave to reach you
t= distance/speed= 1000/340 = 3 sec (aprox)
as the sound out of phase with light too, so option (d) is correct.
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