Announcements 8/29/11
Prayer
Close to Home:

Introductions

This section: Physics majors and
minors only!
a. For others, section 1 is in 445
MARB, right now

Signup sheet to be passed around
a. Willing to offer prayers in class
b. Willing to have phone number
and/or email on a class directory

Syllabus

Objectives. Five units:
a. Fluids
b. Thermodynamics
c. Waves/sound
d. Optics
e. Relativity
Syllabus, cont.

Schedule
a. Reading assignments, lecture topics
b. HW/Lab/Term project due dates
c. Exams
Syllabus, cont.

Grading
a. Guaranteed levels:
b. Categories
Syllabus, cont.

Clicker quizzes
a. Two types of questions
– Reading quizzes, 2 points if right, 1 point if
attempted
– Thought questions, 1 point if attempted
b. All questions from a day = 1 quiz
c. 4 free quizzes, no make-up quizzes
d. Register your clicker via class website ASAP!
– Quizzes start next class period
Syllabus, cont.



Exams, final, term project
a. More details later
Labs
a. Assignments at back of packet
b. First lab begins this Saturday
c. Typically 1 week to complete labs
d. Don’t count on being able to do it the last
Saturday!
Extra credit
a. In syllabus, read about on your own
Syllabus, cont.

Class website
a.
b.

www.physics.byu.edu → Courses → Class Web Pages → Physics 123
(Colton J)
http://www.physics.byu.edu/faculty/colton/courses/phy123-fall11/
On website:
a.
Study aids
–
–
–
–
b.
c.
d.
e.
Lecture notes
Demo videos
Old exams
Exam solutions
Obtain class ID number (“CID”)
Register clicker
HW submission
Check grade
f.
g.
h.
i.
j.
Labs 3, 6 details
Term project details
Math review handout
Mathematica handout
Etc.
Syllabus, cont.

Where to get help on homework
a. Other students
b. Dr. Colton’s office hours
– MWF 2-3 pm (for now), Underground Lab
study area under the skylight
– If you don’t know where that is, there are
directions in the syllabus
c. Chris Mackprang’s office hours
– MW 5:30-7 pm, F 3:30-5 pm; same location
as mine
d. The Tutorial Lab, 3rd floor of ESC (info on
class webpage)
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. Late HW
–
–
4 free late ones, chosen to give you most pts
All other late HW is 50%
b. All work must be turned in, even for computergraded problems
–
TA has 5 pts for each assignment at his discretion, for
legibility/completeness/etc
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. First HW due Wednesday night!
e. My HW solutions – posted in hallway by CSR office
And now, for the Physics…




Serway chapters 1-13, 15: Newtonian
Mechanics
a. Covered in Physics 121
Serway chapter 14: Fluids (static & moving)
a. Starting right now!
Then Thermodynamics (chapters 19-22)
Then other stuff


1 Pascal = ??
1 atm = ??
a. 1.013105 Pa
b. 14.70 psi
Pressure
Force
P
Area
Demos
Pressure vs. force
 Collapsing can
 Magdeburg hemispheres
a. von Guericke and the first vacuum pump,
1654 demo for Ferdinand III

Density



Units?
mass
density 
volume
Density of water:
a. 1000 kg/m3
= 1 g/cm3
“Specific gravity”
Air, standard conds
0.0013
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
Silver
10.50
Lead
11.30
Gold
19.30
Platinum
21.40
Pressure vs. Depth

Weight of water above area A?
(depth h)

Pressure at h: (include weight of air)
Fluid pushes in all directions
Summary

“How to get started”
http://www.physics.byu.edu/faculty/colton/courses/phy123-fall11/

Work hard!!
(More Strange Quark comics at Dr. Durfee’s website, http://sqcomic.com )