Name: Physics A Module 2 Homework Directions: Complete the following problems showing all of your work. Turn in your completed worksheet to your teacher. \" Short Answer 1. In the United States, we often use the imperial system of measures. In the imperial system, distance, for example, is measured in units of inches, feet, yards, and miles. Explain how the metric system, with its standardized prefixes, make unit conversions simpler. 2. Give an example of a time when it is helpful to use scientific notation, and an example oftime when it is not. 3. 1Ii'ii'hy are scatter plots helpful in quickly determining a qualitatiye relationship that may exist in a data set?I 4. Anthony and a friend from physics class are talking about scalars and vectors. Anthony argues that scalars are not useful, because they always contain less information than yectors. Is this an accurate statement? Explain your answer. 5. Clarence is taking his dog for a walk around town. After wandering around for an hour, his mother calls him, telling him dinner will be served soon, and asks him how far away he is. What value would be more helpful for him to give, his distance or his displacement? Explain your answer. 6. Sheila received a speeding ticket when she was driving to her job. Was this ticket issued due to her average velocity during her drive or her instantaneous velocity. Explain your answer? 7. Does a negative value for acceleration always mean that the object is slowing down? Explain your answer. Practice 8. The tesla is an SI-derived unit for the strength of a magnetic field. A scientist measures a magnetic field of strength 12.4 microteslas. Express this value in the base unit of teslas, writing your answer in standard notation. 9. Express the value 12.4 microteslas in the base unit of teslas, but write your answer in scientific notation. 10. Cory is studying the relationship between the temperature (T) of water, and the volume (v) of a certain gas that can dissolve in the water. He comes up with the following equation that describes the relationship: v = 0.036T+0.21. What is the qualitative relationship that describes this quantitative relationship? -Go on to next page-11. Regina has been monitoring the daily high temperature at her home for several years. Looking at the data, she sees that there is a very clear pattern of temperatures being high in the summer, decreasing during the fall, being low in the winter, and increasing during the spring. Based on this, what type of correlation is there between time and daily high temperature? 12. Leslie's cat walks 4 meters east, 3 meters south, 2 meters west, and 9 meters north. What is the cat's distance and displacement at the end of this walk? 13. Yesenia is driving her car north. In a period of 12.0 minutes, she covers a distance of 17.6 km. What is Yesenia's average velocity in meters per second? 14. Victor is driving south. He is travelling at 12 m/s, when he enters an area with a new speed limit. Aver a period of 6 seconds, his speed increases from 12 m/s to 29 m/s. What is Victor's acceleration during this period? 15. Lucile throws a water balloon off of the edge of a building. She throws it downward with a speed of 4.1 m/s. After 1.5 seconds, what is the balloon's velocity? 16. A rock breaks loose from the top of a 119 m cliff. How fast is the rock going when it reaches the ground below? -Go on to next page-Application A group of physics students are on a bridge that is an unknown distance above the river below. They are dropping objects from the bridge platform and recording their results. Answer the following questions about their experiment. 17. The students want to calculate how high the bridge is above the water. They are able to measure time accurate to the tenth of a second. How will this limit the precision of their height calculations? 18. The students measure that it takes an object approximately 3.1 seconds to travel from the bridge to the water below. What is the height of the bridge? 19. For the second part of the project, the students attach small paper parachutes to the objects. They find that the larger the area of the parachute, the longer it takes the objects to reach the water below. What is the qualitative relationship exhibited? 20. The students want to draw a graph showing the velocity of the object with respect to time. What will the graph's shape and slope be