Q1 all through its evolution a star of 1 solar mass the, Ask an Expert

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Q1. All through its evolution, a star of 1 solar mass (the mass of our Sun) expands to 3.33 times its original radius. Assume that, during this expansion:

1. Star has no appreciable loss of mass
2. Mass is uniformly distributed through the volume
3. Star remains spherical during the entire process

a) If the star was initially spinning with a period of To = 36.9 days: find Tf, the period of rotation of the star after the expansion1 days

b) compute the ratio R., where

R = (final kinetic energy of the star)/(initial kinetic energy of the star)

Q2. A 100 arrow is shot vertically from a bow whose efficient spring constant is 500. If the bow is drawn 75 before shooting the arrow, to what height does the arrow rise?

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Category:- Physics
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