PLS Help!!! NO LINKS PLS Considering the diagram below, add the following vectors and determine what vector they will equal to.
1) K+J+D+N= ?
3)B+F+X+A=?

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?