1. The problem statement, all variables and given/known data A man drops a stone into a water well on his farm. He hears the sound of the splash 3.18 s later. How deep is the well? The acceleration due to gravity is 9.8 m/s^2 and the speed of sound in air is 316 m/s. Answer in units of m. 2. Relevant equations x - x0 = v0t + (1/2)at2 3. The attempt at a solution x - x0 = 316 m/s + (1/2)(-9.8 m/s^2)(3.18 s)2 x - x0 = 955.32924 m -------- I think I'm doing this correctly...but it's coming out as wrong. I think it's because I'm assuming the speed of sound given (316 m/s) is the initial velocity; but isn't that correct? Any help would be appreciated.