physics
posted by raj .
to find the depth of the water surface in a well, a person drops a stone from the top of the well and simultaneously starts a stopwatch. The watch is stopped when the splash is heard, giving a reading of 3.65 s. The speed of sound is 340 m/s. Find the depth of the water surface below the top of the well. Take the person's reaction time for stoppping the watch to be 0.250 s.

stone time (T) plus splash time (t) equals watch time minus reaction time
T + t = 3.65  .25 __ t = 3.4  T
d = .5 * g * T^2 __ g = 9.8 m/s^2
also, d = 340 * t __ d = 340(3.4  T)
4.9 T^2 = 1156  340 T
4.9 T^2 + 340 T  1156 = 0
use quadratic formula to find T, then plug in to find the depth 
3.57
Respond to this Question
Similar Questions

physics
1. A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.50 s later. Find the depth of the well if the air temperature is 10.0°C. 2. Calculate the sound level in decibels of a sound wave that has an … 
physics repost
1. A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.50 s later. Find the depth of the well if the air temperature is 10.0°C. 2. Calculate the sound level in decibels of a sound wave that has an … 
Physics
Please help. I got 338.82 for the velocity and wanted to get the distance, but I can't seem to do it because I don't have the wavelength. Please help! A stone is dropped from rest into a well. The sound of the splash is heard exactly … 
physics
A stone is thrown downward into a well with an initial speed of 5.00 m/s. The sound of splash is heard 1.50 s later. Find the depth of the well if the air temperature is 15.0 ˚C? 
Physics
A stone is dropped from the top of a cliff. The splash it makes when striking the water below is heard 3.5 s later. How high is the cliff 
PHYSICS
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? 
physics
A stone is dropped into a well, and the sound of the splash is heard in 7.7 seconds, if the velocity of sound be 343 m/s, find depth of the well. 
Physics
A stone is dropped into a well of depth 11 m. How long after that, the sound of the splash can be heard? 
physics
A stone is dropped into a well and the sound of the splash is heard after 3.91 seconds. If the depth of the well is 67.7 meter, find the velocity of sound? 
physics
An inquisitive physics student and mountain climber climbs a 50.0m high cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone …