PHYSICS 113 SYLLABUS

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

Office: Olin 215, Lab: Olin 213Phone: 758-4981

e-mail: macoskjc@wfu.edu

OFFICE HOURSMWF 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)

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, 2005Last day to drop class: Sept 28, 2005

Exam 1: Monday, Sept. 19, 2005Exam 2: Wednesday, Oct. 19, 2005Exam 3: Friday, Nov. 18, 2005Final: 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.

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.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday

Aug. 24

Introduction

Chapter 1

Aug. 25 Aug. 26

Chapter 2

Motion in 1D

Aug. 27 Aug. 28

Aug. 29

Ch. 2: 1-D motion

Last day of “free” Drop/Add

Aug. 30 Aug. 31

Chapter 3

Vectors

Sept. 1 Sept. 2

Chapter 3

Vectors

Sept. 3 Sept. 4

Sept. 5

Chapter 4

Motion in 2D

Sept. 6 Sept. 7

Chapter 4

Motion in 2D

Last day to add courses

Sept. 8 Sept. 9

Chapter 5

Force & Motion I

Sept. 10 Sept. 11

Sept. 12

Chapter 5

Force & Motion I

Sept. 13 Sept. 14

Chapter 6

Force & Motion II

Sept. 15 Sept. 16

Catch-up & Review

Sept. 17 Sept. 18

Sept. 19

Midterm 1

Chapters 1-6

Sept. 20 Sept. 21

Chapter 7

Energy Transfer

Sept. 22 Sept. 23

Chapter 7

Energy Transfer

Sept. 24 Sept. 25

Sept. 26

Chapter 8

Potential energy

Sept. 27 Sept. 28

Chapter 8

Potential energy

Last day to drop class

Sept. 29 Sept. 30

Chapter 9

Linear Momentum and Collisions

Tentative outline of class

Monday Tuesday

Wednesday Thursday Friday Saturday Sunday

Oct. 1 Oct. 2

Oct. 3

Chapter 9

Linear Momentum and Collisions

Oct. 4 Oct. 5

Chapter 10

Rotation

Oct. 6 Oct. 7

Chapter 10

Rotation

Oct. 8 Oct. 9

Oct. 10

Chapter 11

Angular Momentum

Oct. 11 Oct. 12

Chapter 11

Angular Momentum

Oct. 13 Oct. 14

Fall Break

Oct. 15 Oct. 16

Oct. 17

Catch-up and review

Oct. 18 Oct. 19

Midterm 2

Chapters 7-11

Oct. 20 Oct. 21

Chapter 12

Static Equilibrium

Oct. 22 Oct. 23

Oct. 24

Chapter 13

Universal Gravitation

Oct. 25 Oct. 26

Chapter 13

Universal Gravitation

Oct. 27 Oct. 28

Chapter 14

Fluids

Oct. 29 Oct. 30

Oct. 31

Chapter 14

Fluids

Tentative outline of class

Monday Tuesday Wednesday Thursday Friday Saturday Sunday

Nov. 1 Nov. 2

Chapter 15

Oscillations

Nov. 3 Nov. 4

Chapter 15

Oscillations

Nov. 5 Nov. 6

Nov. 7

Chapter 16

Waves I

Nov. 8 Nov. 9

Chapter 16

Waves I

Nov. 10 Nov. 11

Chapter 17

Waves II

Nov. 12 Nov. 13

Nov. 14

Chapter 18

Waves III

Nov. 15 Nov. 16

Catch-up & Review

Nov. 17 Nov. 18

Midterm 3

Chapters 12-18

Nov. 19 Nov. 20

Nov. 21

Chapter 19

Temperature

Nov. 22 Nov. 23

Thanksgiving break

Nov. 24

Thanksgiving

break

Nov. 25

Thanksgiving break

Nov. 26 Nov. 27

Nov. 28

Chapter 19

Temperature

Nov. 29 Nov. 30

Chapter 20 Thermodynamics

Monday Tuesday Wednesday Thursday Friday Saturday Sunday

Dec. 1 Dec 2

Catch-Up & Review

Dec. 3 Dec. 4

Dec. 5

Final

9 AM (section A)

Dec. 6 Dec. 7 Dec. 8 Dec. 9 Dec. 10 Dec. 11

Dec. 12

Winter break

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. 

Monday Tuesday Wednesday Thursday Friday Saturday Sunday

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

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/

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.

Changing units

We need to apply conversion factors (a ratio of units that are equal to one) to get the right units

A snail crawls along with a speed of one inch per minute.

What’s its speed in m/s?

See appendix for conversion factors

Black board example 1.1

A significant figure is a reliably known figure. Give answers in significant figures. black board examples.

Significant figures

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 ______________)

Factor Name  Symbol

1024 yotta Y

1021 zetta Z

1018 exa E

1015 peta P

1012 tera T

109 giga G

106 mega M

103 kilo k

102 hecto h

101 deka da

10-1 deci d

10-2 centi c

10-3 milli m

10-6 micro µ

10-9 nano n

10-12 pico p

10-15 femto f

10-18 atto a

10-21 zepto z

10-24 yocto y

The 20 SI prefixes used to form decimal multiples and submultiples of SI units (from NIST).

DNA has a diameter of 2x10-9 m. How many nanometer is that?

Black board example 1.2

The building blocks of matter

• 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 force microscope

image of gold surface

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.

Density:

Density = _______________

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

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.

(a) 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) (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.500 µm, what is the length of the fiber?

Black board example 1.3 (problem 20)

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.

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?

Black board example 1.4

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?).

Review: • Length, mass, time

• SI units

• Dimensional analysis, conversion of units

• Order-of-magnitude estimates

• Significant figures