7. Two billiard balls of equal mass, one blue and the other red, slide towards each other at 2.0m/s in opposite directions towards each other. They collide head on and rebound both at 1.8m/s in opposite to their original
velocities, a s shown in the diagram below. Show how momentum is conserved in this collision.

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.