Question

angular momentum of sun as it spins about its own axis? can someone check the math

Answer 1

using L = I x w is the answer 2.379 x 10^43 kg/m^2/s? ??

Answer 2

Well, the sun can be approximated as a ball with a central axis. That will help you find the appropriate moment of inertia.

As for the angular velocity, what do we use? Is it with respect to Earth? So, one rotation per year? Or does the sun have a greater angular velocity than that? I don't know what it is. More importantly, I don't know what value your professor or book gives.

Answer 3

Wolfram Alpha gives \(2.904×10^{-6}\rm\ rad/s\) for the sun's angular velocity.
Wolfram Alpha gives the mass to be \(1.988435×10^{30}\rm\ km\).
A great brief reference to moments of inertia is here:
http://hyperphysics.phy-astr.gsu.edu/hbase/mi.html#cmi