1. You are introduced to three ways to add vectors, list them. What method do you think is the most accurate? And what method do you prefer to use? 2. What factors do you think might affect each of the three methods? 3. What does equilibrium mean?

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

Working alone at its constant rate, pump x pumped out ¼ of the water in a tank in 2 hours. then pumps y and z started working and the three pumps, working simultaneously at their respective constant rates, pumped out the rest of the water in 3 hours. if pump y, working alone at its constant rate, would have taken 18 hours to pump out the rest of the water, how many hours would it have taken pump z, working alone at its constant rate, to pump out all of the water that was pumped out of the tank? a) 6b) 12c) 15d) 18e) 24

Energy conservation is the process by which one kind of energy changes into a another and when energy is converted this way it's not lost or used up. true or false