Posted by **JULIET** on Friday, September 24, 2010 at 1:37am.

A rock is dropped from rest into a well. The sound of the splash is heard 2.40 s after the rock is

released from rest. (a) How far below the top of the well is the surface of the water? The speed of sound

in air (at the ambient temperature) is 336 m/s. (3p) (b) What If? If the travel time for the sound is

neglected, what percentage error is introduced when the depth of the well is calculated?

- PHYSICS -
**MathMate**, Friday, September 24, 2010 at 9:39am
Speed of sound, s=336 m/s

depth, x m

initial velocity = 0 =u m/s

total time, T = 2.4 seconds

time to descendm, t= 2.4 - x/s

x=ut+(1/2)gt²

t+x/s=2.4

t+(ut+(1/2)gt²)/s=2.4

Solve for t. I get t=2.32(approx.)

x=ut+(1/2)gt²

=26.4 m (approx.)

For part b, calculate x when t=2.4 and compare with part a.

- PHYSICS -
**katleho**, Thursday, September 29, 2016 at 12:26pm
I get 28.2m

## Answer This Question

## Related Questions

- physics - (a) The sound of the splash is actually heard 2.2 s after the rock is ...
- Physics - A rock is dropped from a sea cliff 400m high.If the speed of sound is ...
- College Physics - Part A) A 2.2 kg rock is released from rest at the surface of ...
- physics sound - 1. A stone is dropped from rest into a well. The sound of the ...
- physics - A rock is dropped from rest off a cliff to the surface of a lake which...
- Physics - 5kg rock is dropped into a well and a splash is heard after 3 seconds...
- physics - 1. A stone is dropped from rest into a well. The sound of the splash ...
- physics - A rock is dropped off of a bridge into the water below. If the ...
- physics - A rock is dropped into a well. Five Seconds later a splash is heard. ...
- physics repost - 1. A stone is dropped from rest into a well. The sound of the ...

More Related Questions