Today:
Finish Ch 11 (Atomic Structure of Nature)
Start Ch 13 (Liquids)
Ch 13 (Liquids)
First, concept of density (in Ch 12, everything else of which we are skipping)
mass
Density =
volume
Simply related by
g = 9.8 N/kg
Weight density =
weight
volume
(near
Today:
Finish Gases and Plasmas (Chapter 14)
(including the demos)
Start Temperature, Heat, and Expansion
(Chap 15)
Heat (Chapter 15)
How hot something feels is a measure of the kinetic energy of the
constituent atoms/molecules these are continually ran
Today:
Finish Chapter 15 (Temperature, Heat
and Expansion)
A few discussion/revision questions on
last few chapters
If you stake out a plot of land with a steel tape on a very
hot day, the actual amount of land you will have will be
A) smaller than meas
Today:
Chapter 19 (Vibrations and Waves)
Vibrations
Some Preliminaries
Vibration = oscillation = anything that has a back-and-forth to it
Eg. Draw a pen back and forth over the same line, repeatedly:
When you come back to the same point defines one cycle,
Today: Sound (Ch 20)
Preliminaries
What is the origin of sound?
Vibrations of objects. Eg. of a string, of a reed, of vocal cords.
Usually the small vibration stimulates vibration of a larger object eg. of
the air, that then propagates through surrounding
TODAY
Chapter 22: Electrostatics
Electrical Force: Coulombs Law
Charged particles exert forces
on one another :
Like charges repel each other
Unlike charges attract
Acts along a line connecting the charges
C = Coulomb, unit of
Determined by Coulombs La
Today
Finish Chapter 23 from last time
Review Session for Midterm 2 on
Friday
(which is on everything from Ch 11 up to
what we got up to on Friday see more
information shortly)
Review for Midterm 2
Midterm 2: Tue Nov 13
Chs 11, 13, 14, 15, 19, 20, 22,
Please pick up your bubble-sheet & solutions !
Average: 27.7/40 = 69%
Top grade: 37/40 = 92.5%
I curve: roughly, the corresponding letter grades are:
A+ >92, A 8592, A- 8084, B+ 75-79
, B 6574, B- 60
64, C+ 5559, C 5054, D 4549, F < 45
40
35
30
25
20
15
1 Vectors A, B, and C are added to give vector R. If R and B are both parallel to y-axis, |A|=7 ,
with an angle with +x direction A=300 , |C|=9 find the possible values of the angle formed by C,
with +x-direction. ( Hint : find Cx first! )
2 A soccer ball
Today:
Finish Chapter 13 (Liquids)
Start Chapter 14 (Gases and Plasmas)
Gases and plasmas: Preliminaries
Will now apply concepts of fluid pressure, buoyancy,
flotation of Ch.13, to the atmosphere.
Main difference between a liquid like water and a gas lik
Please pick up your bubble-sheet & solutions !
Average: 27.2/40 = 68%
Top grade: 38/40 = 95%
I curve: roughly, the corresponding letter grades are:
A+ >92, A 8592, A- 8084, B+ 75-79
, B 6574, B6064, C+ 5563, C 5054, D 4549, F < 45
40
score
35
30
25
20
15
Welcome to Physics 101 !
Basic Concepts of Physics
Based on the book by Paul G. Hewitt:
Please pick up one handout for today, and a clicker
Book chapter
Syllabus:
(on your handout)
Topic
Introduction/Newtons First Law
1, 2
Linear Motion
3
Newton's Second
Physics 101:
Today: Chapter 3
Chapter 3: Linear Motion
Preliminaries
Linear motion is motion in a straight line.
Note that motion is relative: eg your paper is moving at
107 000 km/hr relative to the sun. But it is at rest relative to you.
Unless other
Physics 101
Today: Chap 4 - Newtons Second Law
Will establish a relationship between force (chap 2) and
acceleration (chap. 3).
Mass and Weight
Mass = measure of inertia of object. Quantity of matter in the
object. Denote m.
Recall: inertia measures resi
Physics 101
Today
Chapter 5: Newtons Third Law
First, lets clarify notion of a force:
Previously defined force as a push or pull. Better to think of
force as an interaction between two objects.
Eg. I push on the table, it pushes back on me with an equal
a
Today - Chapter 6: Momentum
Next week:
Tuesday I am away at a conference so Mr. Arun
Rajam (PhD student in physics) will cover this class.
Friday No class, due to Rosh Hoshanah (Hunter
closed)
Today - Chapter 6: Momentum
Momentum = inertia in motion
Spec
Today: Chapter 7 - Energy
Energy is a central concept in all of science. We will discuss
how energy appears in different forms, but cannot be created
or destroyed. Some forms are more useful than others in the
sense of doing work.
Before getting into this
Today
Chapter 8: Rotation
Chapter 8: Rotational Motion
If you ride near the outside of a merry-go-round, do you go
faster or slower than if you ride near the middle?
It depends on whether faster means
-a faster linear speed (= speed), ie more distance
cov
Today:
- Finish Chapter 8 (Rotation)
- Chapter 9 (Gravity)
Next Lecture
- Fri Oct 2nd Review Session for Midterm
- Midterm on Oct 6th is on Chs 29
Chapter 9: Gravity
Newton: made revolutionary
connection between the circular
motion of celestial bodies and
Today:
Finish Ch 9 (Gravity)
Review Session for Midterm 1
Review for Midterm 1
Midterm 1 is Tues Oct 6
On Chapters 2 through 9
Bring No. 2 Pencil for Bubble-Sheet
40 multiple-choice questions
I will hold extended office hours on morning of Tues Oct 6:
Electric Field and Potential
Abstract
The relationship between electric field, electrical potential, and voltage
were studied by creating simulated charge distributions and mapping their equipotential
and electric field lines within their loci.
Introducti