Show that for air at 20C the speed of a tube in 1ftes per second is given

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Show that for air at 20◦C the speed of a tube in 1ftes per second is given by, approximately.

12d3 L +tl 3

where the length L and diameter d are in centimeters; we have tried to correct for end effects on tube of finite length by treating the ends as two halves of a hole in series with the tube.

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Thermal Physics

ISBN: 978-0716710882

2nd Edition

Authors: Charles Kittel, Herbert Kroem

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