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Polly is standing on the bottom of a wide canyon leaning against its wall She shouts hello toward the opposite side of the canyon If the speed of sound is 340 msec and Polly hears her own echo 4?
Wiki User
∙ 10y ago
The exact figure depends on the climatic conditions: pressure, humidity etc but the canyon is 2-sound-seconds wide, which is 663 metres.
Wiki User
∙ 7y ago
Allan Gregory
Allan Gregory
If Polly hears her own echo 4 seconds after shouting, the total round-trip time for the sound wave to travel from Polly to the canyon wall and back is 8 seconds. This means the width of the canyon is approximately 2,720 meters (8 seconds multiplied by the speed of sound, 340 meters per second).
Carson Graham
It will take 45 seconds
Wiki User
∙ 13y ago30 sec.
Wiki User
∙ 10y ago680 m.
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