What is also known as motion energy

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

How to tell if a molecule is polar or nonpolar with electronegativity

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?