13. How much work do you need to do if you use a force of 5 Newtons to move a table 10 meters? O 0.5 N-m
O 50 N-m
O 2 N-m
O 500 N-m

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

The least penetrating form of radiation is

What is the frequency if a wave that pases a given pount 22 times in 2 seconds