1) Why do scientists use graphs to represent data? 2) Which SI unit would you use to measure: Length of a table, Mass of a person,Time for a race & Temperature of water 3) How can you tell how many significant figures are in a number like 0.00450? 4) If two cars have the same speed but opposite directions, how would their velocities compare? 5) What is the difference between instantaneous speed and average speed? 6) How do you calculate average speed? 7) How far did the car travel during the first hour of the trip? What was the average speed of the car for the first hour of travel? 8) Motion can be modeled with ticker tape diagrams. All dots bundled in one location on a ticker tape represents an object 9) Describe the motion of ticker tapes 10) Describe the motions 11) A car travels 200 miles west for two hours. Then it travels another 75 miles west for an additional hour. What is the average velocity of the entire trip? 12) How would you change a car's velocity? 13) The speedometer of a car moving to the east reads 55 mph. It passes another car that moves to the west at 55 mph. Do the cars have the same speed?Do the cars have the same velocity? Explain your answer.  14) Give an example of something that has a constant speed, but not a constant velocity. 15) Tell me the difference between speed and velocity 16) What is scalar and vector quantity

Physics DBA

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