2 skate boarders collide while traveling in the same direction. Skate boarder 1 has a mass of 70 kg and skate boarder 2 has a mass of 55 kg. What is the speed of skate
boarder 2 after the collision?

Which would not reduce the amount of green house gasses in the air

Which of the following represents an upside-down image?

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.