On his way to a concert, John stops at the mall to buy some camera film. If you divide the distance he travels to the concert by his average speed for the entire trip, you are calculating:.

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?