110. (a) We expect the center of the star to be a displacement node. The star has spherical
symmetry and the waves are spherical. If matter at the center moved it would move
equally in all directions and this is not possible.
(b) We assume the oscillation is at the lowest resonance frequency. Then, exactly one
fourth of a wavelength fits the star radius. If
λ
is the wavelength and
R
is the star radius
then
λ
= 4
R
. The frequency is
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 Spring '09
 NAJAFZADEH
 mechanics, λ, 108 m, 1010 kg, 1022 Pa

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