A sound wave in air has a frequency of 420.0 Hz. (a) What is its wavelength? m

Physics
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A sound wave in air has a frequency of 420.0 Hz.

(a) What is its wavelength?
 m
(b) If the frequency of the sound is increased, does its wavelength increase, decrease, or stay the same?
    

Explain. 

This answer has not been graded yet.


(c) Calculate the wavelength for a sound wave with a frequency of 450.0 Hz.
 m
Mar 31st, 2015

The speed of sound in the air is 343 m/s, V = f*lambda 

lambda = 343/f = 343/420 = 0.817 m 

wavelength decrease becasue its speed does not change 

lambda = 343/450 = 0.762 m 

Apr 1st, 2015

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