- #1

samisoccer9

- 11

- 0

## Homework Statement

- A woman drops a stone into a well 180 m deep. If the air temperature is 20 oC, how much time will elapse between the moment the stone is dropped and the moment the sound of the stone hitting the bottom of the well is heard? [6.6s]

## Homework Equations

Vsound = 331.4 + .59 x T

vt = d or one of the big five equations regarding kinematics?

## The Attempt at a Solution

i find the new velocity of sound to be 343.2 m/s using the above equation, and i then tried to multiply the distance, 180m, by two, as sound travels there and back, and then take the equation t = d/v, t = 360/343.2, but it didnt give the right answer. i believe it has do to with kinematics regarding freefall maybe, or just incorporating accel. answer is 6.6s ^^