Why is it important to follow all directions in an experiment carefully

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?

What happens to an isotope during radioactive decay?

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.