How fast is it moving at the instant it reaches the top of its trajectory if the projectile is
fired upward at 31◦
from the horizontal?
Answer in units of m/s.

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?

Which sections of the heating curve illustrate this process?

What electron configurations do atoms usually achieve by sharing electrons to form covalent bonds?