Describe characteristics and identify oxidation-reduction(redox) reactions.

plz and thx

Why are some galaxies’ spectra blueshifted rather than redshifted? question 4 options:

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.

How many dots must be added to the symbol to properly represent a standard nitrogen ion? a) 1 b) 3 c) 5 d) 8