A 0.047 kg air hockey puck and a 0.165 kg real hockey puck are flying towards each other on an air hockey table. The air hockey puck is traveling at 1.38 m/s and the real hockey puck is traveling at 0.25 m/s. Wham! They smack into each other. This sends the air hockey puck flying back at 1.157 m/s. How fast and in which direction does the real hockey puck go after the collision? If one puck slows down a little and the other speeds up a bunch, how is it possible that momentum was conserved? Identify which concepts, rules, laws, equations, and features of this system are important and appropriate to solve this problem. Use qualitative, quantitative, and graphical analysis methods to solve this problem.

The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. this simple process iswhich kind of a change? a. a physical changeb. a chemical changec. a nuclear changed. an ionic change

Fill in the blanks with the numbers is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance

Aball horizontally thrown from a cliff at 8m/s