Homework Help: physics

Posted by tim on Sunday, September 3, 2006 at 11:09pm.

You let out a shout, echo comes back and reaches you in 1.4 seconds. if the speed of sound in air is 343 m/s, what is the distance to the cliff?

a. need assitance in setting up problem?

Let d be the distance to the cliff, and V be the speed of sound. The sound must travel a distance 2 d to hear the echo.

2d = V t

Solve for the distance d and substitute the numerical values of t and V.

i was wondering where the 2 came from?

The sound of an echo must make a round trip to the reflecting wall and back. The shouter is also the listener. That's why the 2 is there

s=d/t
you have t and s and want to find d - algebra allows yoy to re-write the equation - be aure to use units in your answer - former teacher

No one has answered this question yet.

Answer this Question

Related Questions

physics - A bat emits a sound whose frequency is 83.6 kHz. The speed of sound in...
Physics - A bat emits a sound whose frequency is 83.2 kHz. The speed of sound in...
physics - A boy drops a 0.10 kg stone down a 150 m well and listens for the echo...
Physics HELP! - The overall length of a piccolo is 30.6 cm. The resonating air ...
Physics- PLEASE HELP - The overall length of a piccolo is 30.6 cm. The ...
Physics- PLEASE HELP - The overall length of a piccolo is 30.6 cm. The ...
Physics- PLEASE HELP - The overall length of a piccolo is 30.6 cm. The ...
Physics Please Help me! - The overall length of a piccolo is 30.6 cm. The ...
Physics URGENT!!! - The overall length of a piccolo is 30.6 cm. The resonating ...
Physics- Elena please help! - The overall length of a piccolo is 30.6 cm. The ...

For Further Reading

First Name:
School Subject:
Answer: