PHY 184 Physics for Scientists Engineers 2 Spring Semester 2007 Lecture 1 1 8 07 184 Lecture 1 1 Meet Your Professor 1 Section 1 Prof Reinhart Schienhorst Section 2 Prof Daniel Stump 1 8 07 184 Lecture 1 2 Meet Your Professor 2 Daniel Stump Ph D 1976 M I T Teaching at MSU since 1980 Theoretical High Energy Physics Office hours Mon Thu 1 00 2 30 pm Learning Center Room 1248 Best way to contact me after class 1 8 07 184 Lecture 1 3 Comparing Data and Theory 1 8 07 184 Lecture 1 4 Meet Your Professor 2 Daniel Stump Ph D 1976 M I T Teaching at MSU since 1980 Theoretical High Energy Physics Office hours Mon Thu 1 00 2 30 pm Learning Center Room 1248 Best way to contact me after class 1 8 07 184 Lecture 1 5 Textbook Bauer and Westfall Physics for Scientists and Engineers 2 McGraw Hill 2005 Available at the MSU Bookstore 1 8 07 184 Lecture 1 6 PHY 184 on the Web Web site http www pa msu edu courses phy184 Homework web site http msu loncapa org Strosacker Learning Center in Room 1248 BPS this building will be our help room for LONCAPA homework Coverage will be numerous and varied hours each week 1 8 07 184 Lecture 1 7 LON CAPA Login Enter your MSU mail id Enter your password Enter msu Click or hit return 1 8 07 184 Lecture 1 8 Grades We grade on a fixed scale no curve What Counts Midterm 1 Midterm 2 Final Exam Homework Total 20 20 30 30 100 Up to 5 extra credit Inclass quizzes using HITT clickers 1 8 07 184 Lecture 1 What Grade 92 x 100 4 0 84 x 923 5 76 x 843 0 68 x 762 5 60 x 682 0 52 x 60 1 5 44 x 52 1 0 0 x 44 0 0 9 To get a good grade in PHY 184 you ll need to do 4 things 1 Come to class pay attention take notes 4 hours wk 2 Do the reading 2 hours wk 3 Do the LON CAPA homework 8 hours wk at least 4 Study for the exams 10 hours the week before the exam 1 8 07 184 Lecture 1 10 Clicker Quizzes HITT clickers purchase at the bookstore Enroll your clicker in LON CAPA by giving your clicker ID 1 8 07 184 Lecture 1 11 Clicker Sign up Registration in LON CAPA Course document Clicker 1 8 07 184 Lecture 1 12 Schedule for PHY 184 Lectures If you care about your grade come to class M Tu W Th 9 10 10 00 Two Midterm Exams Thursday February 8 Thursday March 22 Final Exam Time Thursday May 3 Location TBA Homework due each Tuesday morning at 8 00 am Work on homework every day 1 8 07 184 Lecture 1 13 Syllabus and Exams 1 8 07 184 Lecture 1 14 Electromagnetism 1 8 07 184 Lecture 1 15 Electricity Electricity and and Magnetism Magnetism Electricity and magnetism have been known for thousands of years The philosophers of ancient Greece knew that a piece of amber rubbed with fur would attract small light objects The word for electron and electricity derive from the Greek word for amber Naturally occurring magnetic materials called lodestones were used as early as 300 BC to construct compasses The relationship between electricity and magnetism was not known until the middle of the 19th century 1 8 07 184 Lecture 1 16 Fundamental Forces of Nature The force of gravity was described by Isaac Newton Late 17th century In the 20th century two more forces were discovered The weak force and the strong force inside the atomic nucleus The electromagnetic force and the weak force have a unified theory The electroweak force 1979 Nobel prize in physics for Weinberg Salam and Glashow Currently physicists are working to unify the electroweak force and the strong force Gravity remains a puzzle although it was identified first 1 8 07 184 Lecture 1 17 The Four Forces We think that the four fundamental forces work by exchanging elementary particles Gravity graviton has not been observed Electromagnetic photon the elementary component of light Weak W and Z bosons first observed 1983 but unstable Strong gluons first observed 1978 but confined Thus forces can act across distance objects not touching The Sun attracts the Earth from 93 million miles away The forces act through fields of the exchanged particles A magnet attractsthe iron 1 8 07 184 Lecture 1 18 Gravitational and Electric Forces For gravity we defined a gravitational force and a gravitational potential GM 1M2 F 2 r GM 1M2 U r We will do the same for the electric force and the electric potential We will develop the theory of the electric field to describe the electric force 1 8 07 184 Lecture 1 19 Elementary Particles Exchange particles Leptons Quarks 1 8 07 184 Lecture 1 20 Fermi National Accelerator Laboratory Link 1 8 07 184 Lecture 1 21
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