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PHYSICS 113 SYLLABUS Physics 113-A (CCN: 81104) Fall 2005 Prof. Jed Macosko

PHYSICS 113 SYLLABUS Physics 113-A (CCN: 81104) Fall 2005 Prof. Jed Macosko Office: Olin 215, Lab: Olin 213 Phone: 758-4981 e-mail: macoskjc@wfu.edu OFFICE HOURS MWF 1:00-2:00 pm, 215 Olin Feel free to drop by any time and I’ll try to accommodate you.

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PHYSICS 113 SYLLABUS Physics 113-A (CCN: 81104) Fall 2005 Prof. Jed Macosko

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  1. PHYSICS 113 SYLLABUS • Physics 113-A (CCN: 81104) Fall 2005 • Prof. Jed Macosko • Office: Olin 215, Lab: Olin 213 • Phone: 758-4981 • e-mail: macoskjc@wfu.edu • OFFICE HOURS • MWF 1:00-2:00 pm, 215 Olin • Feel free to drop by any time and I’ll try to accommodate you. • Physics 113 is the first course in a two-semester sequence in calculus-based general physics. It does require the use of calculus and simple vector calculations. • SCHEDULE • Lectures: Mon, Wed, Fri 9:00 – 9:50 am • Each student must also enroll for one laboratory session. • Lab sessions begin the week of Monday, August 29. (see which day and time your particular lab session will be)

  2. TEXT AND MATERIALS The text is the sixth edition of Physics for Scientists and Engineers by Serway & Jewett. For the lab you must get the lab manual from the bookstore (~ $10). EXAMS AND GRADING There will be one final exam and three 50-minute, in-class midterm exams given at the dates listed below. Homework problems will be assigned for each chapter (due two lecture days later) and they will be also be graded. Homework: 20% Laboratory: 13% Worst test score: 10% Intermediate test score: 14% Best test score: 19% Final exam: 20% Homework notebook: 3% Class participation: 1% First class: Aug. 24, 2005 Last day to drop class: Sept 28, 2005 Exam 1: Monday, Sept. 19, 2005 Exam 2: Wednesday, Oct. 19, 2005 Exam 3: Friday, Nov. 18, 2005 Final: Monday, Dec. 5, 2005, 9:00 am 93 1/3 G  100, A; 90 G < 93 1/3, A; 86 2/3 G < 90, B+; 83 1/3 G < 86 2/3, B; 80 G < 83 1/3, B; 76 2/3 G < 80, C+; 73 1/3 G < 76 2/3, C; 70 G < 73 1/3, C; 66 2/3 G < 70, D+; 63 1/3 G < 66 2/3, D; 60 G < 63 1/3, D; G < 60, F.

  3. HOMEWORK AND PROBLEM SOLVING Homework and problem solving is a very important part of learning in a course in physics. Approximately 6-10 questions or problems per chapter will be assigned as homework. We will use WebAssign. Homework is due two lectures after it has been assigned. No late homework is accepted. Some problems may also re-appear on the exams and the final. POSTINGS Homework, exam solutions and other material relating to the course will be posted on the web site for the class: http://www.wfu.edu/~macoskjc/Courses/113Fall05.htm This class does not use CourseInfo or Blackboard. WebAssign http://www.webassign.net/ will be implemented for standard homework assignments. You have nine attempts to get the answers right (Demo follows). ATTENDANCE It is expected that students attend all scheduled classes and laboratory sessions. Attendance at the three exams and the final is required - absence will result in a zero grade unless an official excuse is presented. Excuses should be reported to me in advance or as soon as possible.

  4. Tentative outline of class

  5. Tentative outline of class

  6. TUTOR & HOMEWORK SESSIONS (Room & times to be announced… Stay tuned!!) The tutors: (i)              (ii)               (iii) Tutor sessions in semesters past were very successful and received high marks from students. All students are encouraged to take advantage of this opportunity.

  7. Part 1: Mechanics • Concerned with the motion of objects (larger than atoms; slower than speed of light) • Conservation of energy • Conservation of momentum • Rotation of objects • Oscillations • Thermodynamics

  8. Chapter 1: Physics and Measurement Reading assignment (reading quiz this Friday!): Chapters 1 and 2 Homework 1: (Chp 1) Q5, 12, 17, 22, 52 (Chp 2) Q15 Due: Monday August 29, 2005, 10 pm Check out WebAssign: http://www.webassign.net/

  9. Units • In mechanics the three basic quantities are: • Length (we will use the ________________; Paris, 1792) • Mass (we will use the __________________ Paris, 1792) • Time (we will use the ___________________________) • And combinations of these units (e.g. unit of velocity: m/s) • These are units of the SI (Système International) system that is used throughout the world in the Sciences.

  10. Changing units We need to apply conversion factors (a ratio of units that are equal to one) to get the right units Black board example 1.1 A snail crawls along with a speed of one inch per minute. What’s its speed in m/s? See appendix for conversion factors

  11. Significant figures A significant figure is a reliably known figure. Give answers in significant figures.  black board examples. When adding or subtracting numbers, the number of decimal places in the result should equal the __________ number of decimal places of ___________ term in the sum. When multiplying several quantities, the number of significant figures in the final answer is the same as the significant figures in the _____________ accurate of the quantities being multiplied. (Same for ______________)

  12. The 20 SI prefixes used to form decimal multiples and submultiples of SI units (from NIST). Black board example 1.2 DNA has a diameter of 2x10-9 m. How many nanometer is that?

  13. The building blocks of matter Atomic force microscope image of gold surface • All matter consists of atoms (greek: atomos = not sliceable) • All atoms consist of a nucleus surrounded by electrons • Nuclei consist of protons and neutrons. The sum of neutrons and protons in the nucleus of a particular element is called the atomic __________ of the element. The number of protons is called the atomic ____________. • Protons and Neutrons consist of Quarks (six different varieties) Atomic mass of an element: average mass of one atom in a sample of the element. Unit of the atomic mass: 1u = 1.66·10-27 kg One atom of the ______________ isotope (12C) has a mass of 12 u.

  14. Density: Density r = _______________ For example: Aluminum: 2.7 g/cm3 Lead: 11.3 g/cm3 • Density of matter depends on: • The atomic _____ of the individual atoms • How tightly atoms are packed Black board example 1.3 (problem 20) • Gold, which has a mass of 19.32 g for each cubic centimeter of volume, is the most _________ metal and can be pressed into a thin leaf or drawn out into a long fiber. • If 1.000 oz of gold, with a mass of 27.63 g, is pressed into a leaf of 1.000 µm thickness, what is the area of the leaf? • (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.500 µm, what is the length of the fiber?

  15. Dimensional analysis • Dimensions (In this case we mean the units of a physical quantity) can be treated as _____________ quantities. • Always do a dimensional analysis when solving problems. Black board example 1.4 • Newton's law of universal _______________ is represented by the following equation. • F = GMm/r2 • Here F is the gravitational force, M and m are masses, and r is a length. Force has the SI units kg · m/s2. What are the SI units of the proportionality constant G?

  16. Problem solving: • Always make sure you use the right _________ (conversion may be necessary) • Always do an _____________ estimation (Ask yourself: “Does the number I’m getting make sense?).

  17. Review: • Length, mass, time • SI units • Dimensional analysis, conversion of units • Order-of-magnitude estimates • Significant figures

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