It will take you 0.23 seconds to hear your echo
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What is Echo ?</h3>
Echo can be simply defined as the reflection of sound wave.
Given that you are 38.6 m away from a rock wall, you yell. To know how much time in seconds it will take you to hear your echo to two significant digits, You must make sure to account for the travel from you to the wall and from the wall back to you.
- The speed of sound V = 340 m/s
- The distance D to and fro = 2 x 38.6 = 77.2 m
Speed V is the distance per time
V = D / T
Substitute all the parameters into the formula
340 = 77.2 / T
Make T the subject of formula
T = 77.2 / 340
T = 0.2270
T = 0.23 s to two significant digits
Therefore, it will take you 0.23 seconds to hear your echo.
Learn more about Echo here: brainly.com/question/14090821
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