A loud sound is made in front of a tall building. An echo is heard 4 seconds after the sound is produced. If the speed of sound in air is 320m/s, how far away is the building?
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Speed is distance/time: so if an echo is heard after 4 seconds it had to travel 2x distance(x is the distance between the source and the building) so :
Speed = distance/Time ; D = S/T:
(Answer would be 40 m)
Speed = distance/Time ; D = S/T:
(Answer would be 40 m)
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