How to find energy of sound wave

AI Thread Summary
In the discussion about determining the energy of sound waves, the focus is on comparing three options based on their wavelength and frequency. The key equation mentioned is v = f x lambda, which relates wave speed, frequency, and wavelength. The participant calculates the frequency for option C as 1633 Hz, indicating that higher frequency correlates with greater energy. There is confusion regarding the term "on" in option A, which hinders a complete analysis. Ultimately, the conclusion is that either option A or C is likely to have the greatest energy, with a preference for C based on the frequency calculation.
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Homework Statement


In room temperature air, which of the following sound waves would have the greatest energy associated with it?

A. A wave with lambda equal to 4.7 on
B. A wave with a frequency of 2.6 Hz
C. A wave which has a distance between adjacent nodes (1/2lambda) of 21mm


Homework Equations


v = f x lambda ?
maybe KE = 1/2mv^2 and PE = PGH?
no idea.


The Attempt at a Solution


I'm not exactly sure what an "on" is (referring to letter A, unless that's supposed to be inches? not sure).

A =
?
B = 2.6 Hz
already stated
C = 1633Hz, so above B.
343 = f x .021
343/.21 = 1633Hz
I know higher frequency = higher energy.. so I know The answer is either A or C. Since I don't know what an "on" is, I'm having trouble solving for it. Thanks.
 
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