Fx = 12 N What is the force of friction acting on this box?
UN
What is the net force acting on this box?
N to the
F = 15 N
=
F=3N
F = 12 N

What happens to light waves from a star as the star moves away from earth?

Idon’t quite understand this problem

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20