two objects with different masses collide and bounce back after an elastic collision. before the collision, the two objects were moving at velocities equal in magnitude but opposite in direction. after the collision

The different forms of a gene for a given trait are called .

Whats begin with t, ends with t has t in it

Healing after the death of a loved one is most difficult when: a) the bereaved is not allowed to mourn in the way he or she wishes b) the death is a long, protracted one c.) a period of grief has already elapsed d) no other mourners are present