Two balls roll to the right. Both have a mass of 2.2 kg. The ball in front (the one on the right) has a speed of 2.2 MS . The ball in the back (the one on the left) has a speed of 4.7 ms. They collide and bounce off each other. After the collision, the ball in back has a speed of 0.8 ms . What is the speed of the front ball after the collision?

To protect all four receptacles on a branch circuit that surrounds a swimming pool, you would install which of the following configurations? a. gfci feed-through receptacle at the end of the load's circuit b. gfci-terminated receptacle at the beginning of the load's circuit c. gfci feed-through receptacle at the beginning of the load's circuit and the other receptacles connected to the load side of that receptacle d. gfci-terminated receptacle at each end of the load's circuit

How many dots must be added to the symbol to properly represent a standard nitrogen ion? a) 1 b) 3 c) 5 d) 8

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?