# How to find energy of sound wave

by MySecretAlias
Tags: energy, sound, wave
 P: 6 1. The problem statement, all variables and given/known data 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 2. Relevant equations v = f x lambda ? maybe KE = 1/2mv^2 and PE = PGH? no idea. 3. 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.
 P: 6 I'm so confused :*(

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