Asked by Anonymous
On a day that is 30°c, you drop a rock from the top of a well. You hear the sound of the rock hitting the bottom 0.6s after you drop it. How deep is the well?
Answers
Answered by
Steve
find v, the speed of sound. If the depth of the well is y, then the time taken for the sound to come back is y/v
Using the equation of motion, we have
4.9t^2 = y
Thus, the time it takes to hit the water is √(y/4.9)
Adding up the times, we have
√(y/4.9) + y/v = 0.6
Plugging in your value for v, you just need to solve that for y.
Using the equation of motion, we have
4.9t^2 = y
Thus, the time it takes to hit the water is √(y/4.9)
Adding up the times, we have
√(y/4.9) + y/v = 0.6
Plugging in your value for v, you just need to solve that for y.