PHYS 218 Midterm: Texas A&M Physics 218 Exam1_Fall_2010_solutions
Document Summary
Fill out the information below but do not open the exam until instructed to do so! All work must be shown to get credit for the answer marked. Put your initials here after reading the above instructions:__________ Table to be filled by graders only! Part 1: basic ideas of units, conversions, and vectors. Problem 1. 2: joule, erg and ev are units of energy defined as: 1 ev (electron- volt) = 1. 6 10- 12 erg. Question 1. 2. 1: (2p) express 1 erg in units of joules. Express that energy in joules. 3. 5 1012ev = 3. 5 1012 1. 6 10-12erg = 3. 5 1. 6 erg = 3. 5 1. 6 10-7 j = 5. 6 10-7 j. Problem 1. 3: the following plot shows the position x as a function of time. The magnitude of the velocity at a given time is the magnitude of the slope of the tangent line in the above graph at that given time.
