- #1
Meganwright
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Homework Statement
A molecular cloud 0.2 light years across rotates once every 1.4 ×107 years. If it were to collapse to the size of our Sun, how long would it take to rotate once if it conserved angular momentum given by mvr, where m is mass, v is the circular rotation speed and r is the radius. Is this reasonable in this case?
Homework Equations
l=mvr
The Attempt at a Solution
the suns rotation is approx 26.8 days
the radius i worked out to be 0.1 x 9.4605284 × 10^15 metres = 9.4605284 x 10^14 metres
rotation= 1.4 x 10 ^7 years
do i also use the mass of the sun?
in which case m=1.99 x 10^30 kg?
then sub into
l=mvr ?