Consider a horse pulling a buggy. is the following statement true? the weight of the horse and the normal force exerted by the ground on the horse constitute an interaction pair that are always equal and opposite according to newton's third law. a) yes b) no

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?