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April 21, 2014

Homework Help: physics

Posted by Sandhya on Sunday, November 9, 2008 at 5:29am.

1) Sound propagating through air at 30 degree Celsius passes through a vertical cold front into air that is 40 degree Celsius. If the sound has a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?

(2) What is the intensity of a sound that has intensity level of (a) 50 dB or (b) 90 dB?

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