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March 28, 2015

March 28, 2015

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

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 9:39amSpeed 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.

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