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?

After a car's engine has been running for a while, if you stand near the car's engine you can often feel heat coming from the engine as a result of a. radiation b. convection c. conduction

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.

Which of the following statement is false ? a. batteries should never be stored on metal trays or outside in the elements)b, battery acid cannot be neutralized)c. do not stack batteries on top of each other)d. never put a damaged battery in a dumpster. i