Homework Help: physics

Posted by Vivek on Tuesday, January 3, 2012 at 7:44am.

The earth's atmosphere extends to a height of nearby 200KM above its surface there many be explosion and noises taking place in the outer space but we do not hear them.why?

physics - Damon, Tuesday, January 3, 2012 at 9:48am
Sound is propagated through the atmosphere by the motion of air molecules. No air, no sound.

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