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Use this slide to answer the next question X 1. Which of these observations of the Star labeled X on the previous slide is most likely accurate? X is brighter than the sun, has a surface temperature at 6,300K, and is red X is less bright than the sun, has a surface temperature below 7,800K and is blue. X is brighter than the sun, has a surface temperature above 6,300K, and is red. X is less birght than the sun, has as a surface temperature below 7,800K, and is blue. Use the above picture and explanation to answer the next question The forces are unbalanced, and the boy's force is greater. The forces are unblanced, and the dog's force is greater. The forces are balanced, and the dog is stronger than the boy. The forces are balanced, and the net force is zero. 2. Using the previous slide picutre which of the following best describes the forces in this situation? Use the graph to answer the next question. 3. The previous graph shows the movement of a car over time. What is the car's average speed? 10 km/hr 15 km/hr 30 km/hr 60 km/hr 20 km/hr 40 km/hr 60 km/hr 640 km/hr 4. A train travels 160 kilometers in 4 hours. What is the train's average speed. 60 km/hr 140 km/hr 40 km/hr 4 km/hr 5. A car accelerates from a 20km/hr to 100km/hr in 20 seconds. What is the acceleration? |