Announcements 1/5/10 Prayer Introductions This section: Physics majors and minors only! a. a.For others, section 1 is in 445 MARB – – Meets at same time – – Yes, you should head there right now Two signup sheets to be passed around a. a.Willing to offer prayers in class b. b.Info for class directory, to aid you in forming study groups

Syllabus Objectives. Four units: a. a.Fluids/heat b. b.Waves/sound c. c.Optics d. d.Relativity

Syllabus, cont. Schedule a. a.Reading assignments, lecture topics b. b.HW/Lab/Term project due dates c. c.Exams

Syllabus, cont. Grading a. a.Guaranteed levels: b. b.Categories

Syllabus, cont. Clicker quizzes a. a.Reading quizzes – – 2 points if right, 1 point if attempted b. b.Thought questions – – 1 point if attempted c. c.All questions from a day = 1 quiz d. d.4 free quizzes, no make-up quizzes e. e.Register your clicker via class website ASAP!

Syllabus, cont. Exams, final, term project a. a.More details later Labs a. a.Assignments at back of packet b. b.First lab begins this Saturday Extra credit a. a.Read about on your own

Syllabus, cont. Class website (typo in syllabus) a. a. → Courses → Class Web Pages → Physics 123 (Colton J) b. b. On website: a. a.Study aids – – Lecture notes – – Videos – – Old exams – – Exam solutions b. b.HW submission c. c.Check grade d. d.Obtain class ID e.Clicker registration f.Labs 3, 6 details g.Term project details h.Mathematica info i.Math review handout j.Etc.

Syllabus, cont. Where to get help on homework a. a.Other students b. b.Dr. Colton’s office hours – – MWF right after class, 2-3 pm, Underground Lab study area under the skylight – – If you don’t know where that is, there are directions in the syllabus c. c.Chris Mackprang’s office hours – – MWF 4-5:30 pm, same location as mine d. d.The Tutorial Lab, 3 rd floor of ESC (info on class webpage) e. e.Smart relatives?

Syllabus, cont. Homework: paper-only vs computer-graded The computer-graded HW system Syllabus packet contains problems: Get your missing numbers (“data”) from class website → Put in the [xx]______ spaces before you work the problem set 1. [01] 3.43 [02] 8.20 [03] 22.2 [04] 30.2 [05] 39.8 [06] 4.0 etc.

Syllabus, cont. Computer-graded HW system, cont. Answer range in packet, at end of list of problems: Indicates units, range and decimal places of answer Type into website form: 63.8 Submit all answers at once Partial credit, aka “retries”  Points for each successive try: 5, 5, 3, 0  If you miss, correct answer is given to you  Use new data each time  No retries on multiple choice problems

Syllabus, cont. Final general HW comments: a. a.Late HW – – 4 free late ones, chosen to give you most pts – – All other late HW is 50% b. b.All work must be turned in, even for computer- graded problems – – TA has 5 pts at his discretion, for legibility/completeness/etc c. c.Where to turn in work – – Slot labeled “Phys 123, section 2” in boxes near room N375 ESC – – Don’t put name on work, just your CID d. d.First HW due Wednesday night!

And now, for the Physics… Serway chapters 1-13: Newtonian Mechanics a. a.Covered in Physics 121 Serway chapter 14: Fluids (static & moving) a. a.Starting right now!

Pressure 1 Pascal = ?? 1 atm = ?? a. a  10 5 Pa b. b psi

Demos Pressure vs. force Collapsing can Magdeburg hemispheres a. a.von Guericke and the first vacuum pump, 1654 demo for Ferdinand III

Density Units? Density of water: a. a.1000 kg/m 3 = 1 g/cm 3 “Specific gravity” Air, standard conds Wood (oak) 0.6 – 0.9 Liquid nitrogen 0.81 Ice 0.92 Water 1.00 Bricks 1.84 Aluminum 2.70 Steel 7.80 Silver10.50 Lead11.30 Gold19.30 Platinum21.40

Pressure vs. Depth Weight of water above area A? (depth h) Pressure at h: (include weight of air)

Video Pressure pushes on all sides

Thought Question Thought question: Where is the pressure greater, one meter beneath the surface of Lake Michigan or one meter beneath the surface of a swimming pool? a. a.Lake Michigan b. b.swimming pool c. c.the same

Summary “How to get started” Work hard!! (More Strange Quark comics at Dr. Durfee’s website, )