Find the Height of a Cliff with Sound Homework Help - Expert Guidance"

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Homework Help Overview

The problem involves determining the height of a cliff based on the time it takes for a stone to fall and the sound of the splash to travel back up. The context is rooted in kinematics and sound propagation.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the need to account for both the fall time of the stone and the time for the sound to return. There is mention of using equations related to distance and sound speed, but clarity on the approach is sought.

Discussion Status

The discussion is ongoing, with some participants providing equations and reasoning while others express uncertainty about how to proceed. There is no explicit consensus on the method to solve the problem, and additional questions about related topics have emerged.

Contextual Notes

Participants are navigating the constraints of the problem, including the total time given and the assumptions about sound travel and free fall. There is also a mention of a separate but related problem concerning sound intensity at a concert.

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Ok I need guidance on how to approach this problem. The problem is as follows: A stone is dropped from the top of a cliff. The splash it makes when striking the water below is heard 3.5s later. How high is the cliff?
 
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Does anyone know the answer to this problem?
 
the time is of course the time for it to fall plus the time for the sound to come back up. So therefore use d=\frac{1}{2}at^2 and v_{sound}=\frac{d}{t} then you solve both for time and add them together to produce 3.5 and hence solve for d.
 
ok I had those equations I just didn't think what to do. CAn you help me with this problem also: At a rock concert, a dB meter registered 130 dB when placed 2.8m in front of a loudspeaker on the stage. What is the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in air?

Someone help me please?
 
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