Announcements 8/27/12
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Prayer
Introductions
This section: Physics majors and
minors only!
a. For others, section 1 is in 445
MARB, right now
Signup sheets to be passed
around
a. Willing to offer prayers in class
b. Willing to have phone number
and/or email on a class
directory
My office hours are MWF 2-3 pm
TA is Clément Gaillard, office
Close to Home
hours are MWF, 3-4:30 pm
Syllabus
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Objectives. Five units:
a. Fluids
b. Thermodynamics
c. Waves/sound
d. Optics
e. Relativity
Syllabus, cont.
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Schedule
a. Reading assignments, lecture topics
b. HW/Lab/Term project due dates
c. Exams
Syllabus, cont.
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Grading
a. Guaranteed levels:
b. Categories
Syllabus, cont.
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Class website
a.
www.physics.byu.edu → Courses → Class Web Pages →
Physics 123 (Colton J)
b.
http://www.physics.byu.edu/faculty/colton/courses/phy123-fall12/
Warm-up exercises
a. Available on class website
–
demonstrate
b. Generally due 12:15 pm before class
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Except warmup 1 due midnight tonight!
c. Graded on “Did you carefully complete the reading
assignment?” (yes = 2 pts; no = 1 pt)
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4 free warm-ups, no make-up warm-ups
d. Other text answers help me focus my lecture
Syllabus, cont.
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Clicker quizzes during class
a. Each question = 1 point for participating
b. All questions from a day = 1 quiz
c. 4 free quizzes, no make-up quizzes
d. Register your clicker via class website ASAP!
– Clicker quizzes start next class period
Syllabus, cont.
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Exams, final, term project
a. More details later
Labs
a. Assignments at back of packet
b. Most are in the “Walk-in Lab” on 4th floor
c. First lab begins this Saturday
d. Typically 1 week to complete labs
e. Don’t count on being able to use the
equipment the day it’s due!
Extra credit
a. In syllabus, read about on your own
Syllabus, cont.
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Class website
a.
b.
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www.physics.byu.edu → Courses → Class Web Pages
Pages →
→ Physics
Physics 123
123
(Colton J)
http://www.physics.byu.edu/faculty/colton/courses/phy123-fall12/
On website:
a.
Study aids
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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 5, 6 details
Term project details
Math review handout
Mathematica handout
Etc.
Syllabus, cont.
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Where to get help on homework
a. Other students
b. Dr. Colton’s office hours
– MWF 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. TA’s office hours
– MWF 3:30-5 pm (likely); same location as
mine
d. The Tutorial Lab, 3rd floor of ESC (info on
class webpage)
Syllabus, cont.
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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.
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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.
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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 computer-graded
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. Can turn in unattempted problems for late credit; include
graded assignment
e. First HW due Wednesday night!
f. My HW solutions – posted in hallway by CSR office
And now, for the Physics…
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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
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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
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Density
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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
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Weight of water above area A?
(depth h)
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Pressure at h: (include weight of air)
Fluid pushes in all directions (video, if time)
Summary
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“How to get started”
http://www.physics.byu.edu/faculty/colton/courses/phy123-fall12/
(I didn’t even mention last two items)
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Work hard!!
(More Strange Quark comics at Dr. Durfee’s website, http://sqcomic.com )