A ball P of mass m moving with a velocity v strikes another ball Q of same mass but at rest. After collision if P comes to rest find velocity of Q.
(A) 2v
(B) -V
(C) V
(D)v/2
plz help me fast thank you​

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

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

How do you know how many valence electrons an atom has?