Question

A star with a mass of 3.72 x 1030 kilograms and a radius of 8.67 x 108 meters rotates on its axis once every 32 days. A star is a solid sphere, which has a k value of 2/5. What is the moment of inertia of the star? Include units in your answer. Answer must be in 3 significant digits.

Answer 1

Given data:

* The mass of the star is,

$m=3.72\times10^{30}\text{ kg}$

* The radius of the star is,

$R=8.67\times10^8\text{ m}$

Solution:

The moment of inertia of star in terms of mass and radius,

$I=\frac{2}{5}mR^2$

Substituting the known values,

$undefined$