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September 21, 2014

Homework Help: physics

Posted by ayan on Friday, March 29, 2013 at 1:25am.

Airplanes are noisy things. For example, if you stand really close to a runway, a military jet can produce a sound intensity of about 100 W/m2 at a distance of 30 m from the plane (this is beyond painful noise). You live near a military airport and want to work on physics with your friend. Since you don't want to shout, you decide to find a spot far enough away from the airport that the airplane noise is below the threshold of conversation (10−6 W/m2. How far do you need to go from the airport in kilometers to accomplish this?

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