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You shout at a cliff 120 m high, and hear your echo in 2 seconds. If the speed of sound in the air is 340 m/s, the distance of the cliff from you is __________.

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opudodennis

Answer:

340 m

Explanation:

Since for echo the distance traveled is twice is 2d and we know that speed is distance per unit time is:

[tex]s=\frac{d}{t}[/tex]

but in this case  

[tex]s=\frac{2d}{t}\\\\d=\frac{st}{2}[/tex]

#Substitute s with the speed of sound in air which is given as 340 m/s and t with 2 s then the distance between the cliff and you obtain the distance:

[tex]d={2\times 340 m/s}{2 s}\\\\=340 m[/tex]

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