stuck on 2 questions

[kamy]

The distance between a carbon atom (m = 12 u) and an oxygen atom (m = 16 u) in the carbon momoxide, CO molecule is 1.12angstrom, where 1 angstrom is 1.0E-10 m. How far from the carbon atom is the center of mass of the molecule? Give your answer in angstroms. n.b. "u" is the atomic mass unit or 1.66E-27 kg. However, you do not need to use this conversion as you will find that the "u"'s will cancel.

 

 

An 0.0200 kg rifle bullet traveling 232 m/s buries itself in a 3.70 kg pendulum hanging on a 2.80 m long string, which makes the pendulum swing upward in an arc. Previous examples worked out the vertical displacement,for this question, determine the horizontal component of the pendulum's displacement. Give you answer in m. Hint: Determine the vertical component, then use Pythagoras's theorem on the triangle formed by the horizontal displacement and the length of the pendulum string.

 

 

PLEASE HELP

[swansont]

How have you started to solve the problems?