At least a good four or five billion from years a "dead" white now the Sun will become dwarf stac, shrinking to about 1"% of its current radius. Assume it loses no mass in this process. If the sun currently rotates once every thirty days, then how many radians per second will it be rotating at after it a white dwarf? changes into

College Physics
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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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At least a good four or five billion
years
from
now the Sun will become a "dead" white
st! to
dwarf staC, shrinking to about 1% of its
1*%
current radius. Assume it
loses no mass
in this process, If the sun currently rotates
once every thirty days, then how many radians
per second will it be rotating at after it
changes into a white dwarf?
Transcribed Image Text:At least a good four or five billion years from now the Sun will become a "dead" white st! to dwarf staC, shrinking to about 1% of its 1*% current radius. Assume it loses no mass in this process, If the sun currently rotates once every thirty days, then how many radians per second will it be rotating at after it changes into a white dwarf?
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Step 1

Let original radius = R let original mass = m Final radius = 0.01 RInitial moment of inertia = (2/5)(m)(R)2 final moment of inertia = (2/5)(m)(0.01R)2 Original angular speed = 2π/T  = 2π/(30*24*60*60) = 2π/2592000 rad/sec = 2.424 * 10-6  rad/sec

 

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