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Acoustic Plane Waves in Air
= excess pressure at time
, at some fixed point
through which a plane wave passes
= excess pressure at time
, for a point
which is
meters
``downstream'' from
along the direction of travel
for the plane wave, where
Transverse Waves on a String
= displacement at time
, for some point on the string
= transverse displacement at a point
meters away on the string
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