Download AP Physics B Lesson Plans

AP Physics B Lesson Plans 2011/2012
Day Lesson Notes
1
Seating, Rules
What is science? (What scientists do.)
Scientific Method (7 steps: state problem, gather info, form
hypothesis, do experiment, gather and analyze data, draw
conclusion, report results)
What is physics. (Equations, predictions, etc.)
2
3
4
5
6
7
8
Take HW Questions
Quiz (just like HW)
Sig figs, measurement, and scientific notation
Discuss textbook reading (3 times per chapter: beginning of
chapter, during for help with problems, right before test)
Discuss ?’s vs. problems and how they are noted on assignments
Pass out HW sheets and discuss how to fill in, make copies, etc.
Ch 2 Reading Quiz
Begin Ch 2: Intro to motion
Define “motion.” Needs a frame of reference, or “background.”
Take walk in front of classroom: make p vs. t graph. Quiz on this
tomorrow.
 means “change in” and is always final – initial.
Velocity and displacement are “vectors.”
Instantaneous vs. average velocity. (Example of a trip in a car
x x f  xi
with stops.) v avg 

t
t
Start with quiz (make p vs. t graph of my walk)
Quantities vs. Units: Base (7) and derived (have them list “things
we measure” while I make chart…they infer from chart the
difference between the columns, and the difference between base
and derived) Keep chart for cumulative quiz at end of each
quarter.
v v f  vi
Define acceleration: idea and equation: a 

t
t
Start by taking HW Questions
Derive 4 kinematic equations. Quiz on these tomorrow.
Special cases and hidden givens (a = 0, v init. = 0, stops, etc.)
How to solve problems with them: write all five variables in a
vertical row. Fill in the given ones. Once you have three, choose
and write equation, then solve.
Kinematic Equation Quiz
Graphing: p, v, and a vs. t
Practice Graphing Quiz: real one tomorrow
“Graphs & Tracks”
Graphing Quiz
HW
Read Ch 1
Probs 3, 7,
10, 15, 21,
36, 38, 39
Quiz on Sci
Method &
Ch 1
Ch 2
Read all of
Ch 2
?’s 1—16
Study for
Quiz
3, 10, 11, 16
19—23, 26,
29, 30, 32
33, 34, 39,
47, 49, 50,
57—59,
Study for
Quiz
Graphing
Worksheets
Study for
Quiz
Study for
9
10
11
12
13
14
15
16
17
18
19
20
Graphs & Tracks
Begin Ch. 3: Intro to Vectors
Add and Subtract vectors. Multiply them by a scalar. Show
graphical and analytical methods.
Chapter 2 Test
Ch 3 Reading Quiz
Go over Chapter 2 Test
Continue Chapter 3: Velocities can be added as vectors, too, just
like displacements. Do examples using analytical method.
Define “Projectile Motion” Discuss shadows (on ground and on a
screen) of balls thrown across a field. (X- and y-motions are
independent.) What’s happening with x (or y), v, and a?
Explain equations 3.13 & 3.14 (Discuss symbols and subscripts.)
Show problem solving setup: horizontal variables and 1 equation
(rt = d)on the left; vertical variables (5 of them) and 1 equation
(pick one of the four kinematic equations) on the right.
Example problems with projectile motion.
Relative Motion
Take HW questions.
Projectile demo: use projectile launcher, predict where to put can
to catch ball.
Relative Motion Quiz
Additional fun projectile problems: former AP FR (2000 #1), and
58 & 73.
Chapter 3 Test; HW: AP FR (2006 #2)
Ch 4 Reading Quiz
Begin Ch 4: Dynamics (the “why” of motion)
F = 0 leads to a = 0. Discuss “balanced forces” and “net.”
History: pre-1600: p. 83, section 4.2.
1st Law: inertia. 2nd Law: F (net) = ma (and w = mg)
m
Unit for force: the Newton (N) or kg  2
s
Step 1 for problem solving: draw free body diagram (FBD)
Static equilibrium
“Normal” force
Lab: Is force a vector?
Newton’s 3rd Law
Masses on an incline w/o friction (“well-known” squish rule)
Test
1, 4, 7, 11,
14, 16, 19
Read Ch 3
8—10, 17
18, 20
22, 24, 26,
27, 29, 31
32—36, 38,
39
?’s 1—15,
17, 19, 20
Study for
quiz
Study for Ch
3 Test
Read Ch. 4
1, 2, 5—8, 11
12—18
?’s 2—9
Problems 20,
23
?’s 11—13
Problem 26
21
22
23
Show how to set up problems related to both diagrams.
1 more example problem: like #26 in the book.
Intro to friction. Two factors influence frictional force:  and n.
F = n. Two kinds of static and kinetic. Both are
dimensionless. Go over graph on p. 101.
Masses on flat and inclined surfaces WITH friction. Same 2
problems as day 20, but with friction.
Newton’s 3rd Law
Advanced friction lab
?’s 15—19
Problem 27
34—38, 41
19, 30, 48,
49, 50, 52
55—58, 63
Study for
quiz
53, 62, 64,
65, 68
24
Finish lab
More example problems
25
Mass on incline quiz
Example problems with no numbers:
Find a.
26
Acceleration Lab (with computers and photogates) New lab
69, 71, 76, 79
partners.
Finish Lab; AP Free Response question from Ch. 4 (2008 Form B Lab Writeup
#2, parts a—c)
1 more FR
Prob
Lab due; final questions on ch. 4
Study for test
Ch. 4 Test
Read Ch. 5
Ch 5 Reading Quiz
?’s 1—3
Begin Ch. 5
Probs 1—4
F
(cos

)

s
or
Only
force
in
direction
of
motion
Work  F  s
counts.
Unit for work is N  m or Joule (J)
Work is also m  a  s (Newton’s 2nd law)
Discuss work done on a lifted book: distinguish work done by me
on the book and work done by the book on me. Positive and
negative work. Show Force vs. position graphs for both. Note
symmetry. Area = work done.
2
2
Derive Work Energy Theorem from v f  v0  2as
27
28
29
30
1
1
2
2
mv f  mvi  KE f  KEi
2
2
From Work Energy Theorem: Weight = mg leads to
mgs  mgy  PE f  PEi
Wnet 
31
Gravitational potential energy (mgh)
Kinds of energy: Mechanical (potential (grav., spring, electric)&
kinetic (linear & rotational)) & Heat: energy is neither created
nor destroyed, but changes from one kind to another. When it
8—10, 12—
14
32
33
34
35
36
37
38
39
40
41
42
43
44
45
changes from mechanical to non-mechanical, it does so via a
“non-conservative” force. So really, it’s mechanical energy that is
not being conserved.
Conservative vs. non-conservative forces
Springs: Hooke’s Law
5, 19, 21, 23
Mechanical Energy and its conservation
11,16, 31—
34
Roller Coaster Lab on computers (using Excel)
15, 17, 18,
New lab partners. (Continue this procedure until all in class have 35, 71
been partners.)
Study for
Quiz
Conservation of Mechanical Energy Quiz
36, 39—43,
Finish lab
68
Conservation of Energy with non-conservative forces:
48, 51, 53,
54, 64, 76
Wnc  ( KE  PE ) f  ( KE  PE ) i
Discuss signs in the equation
Power
63, 70, 73, 78
Also show that instantaneous power is force times velocity
?8
Work done by a varying force (refer again to F vs. x curve)
Calculating spring constant lab
Study for
AP FR Prob: 2009 #1
Test
Ch 5 Test
Read Ch 6
Study for
Unit Quiz
Quarter 1 Unit Quiz
Problems 1—
1 2 6
Begin Ch. 6: Momentum: Review how we obtained KE  mv
2
Use similar technique to obtain momentum = mv. Unit for
momentum.
Ch 6 Reading Quiz
Problems 9—
Law of Conservation of momentum
19 odd
Review F vs. x graph and how “area under curve” = work done.
Similarly, on F vs. t graph, “area under curve” = p or impulse.
Graph F vs. t for A pushing B and for B pushing A: note
symmetry. Leads to conservation of momentum: p A  p B
Example problems: explosions, elastic collisions, inelastic
?’s 3—6;
collisions. Look at vocabulary: “totally”, etc.
Probs 12, 18,
29
Ballistic Pendulum: derive equation and show.
?’s 7—12;
Probs 22, 27,
30
Conservation of momentum lab with carts and computers
?’s 13—18;
Probs 34, 56,
57, 59
Conservation of momentum quiz
Work on lab
Finish lab
46
47
48
49
50
51
Labs due.
AP Free Response Example(s) (2008 #1)
Questions/Review
Chapter 6 Test
Ch 7 Reading Quiz
Begin Ch. 7: Uniform Circular Motion
Think of a meter stick rotating with one end fixed. What is the
same about all parts? (  ) What is different? (v)
Quantities:  , , , v, ac , at
Units for  ,  , 
What does it mean for circular motion to be “uniform?”
Is speed constant? Is velocity constant?
Adjectives: centripetal & centrifugal
Review of “the radian” and angle measure
x  r
Trio of helpful equations: v  r
a  r
Rotational Kinematics: 4 equations
Derive centripetal acceleration and centripetal force.
mv 2
Centripetal force:
r
Roller coasters: speed (minimum) at top of loop. Speed
(maximum) at top of a bump.
Cars: friction on curves, banked roads (normal force has
centripetal component).
Gravitation: orbits (circular or elliptical…what causes each?)
Fg  Fc 
 circular
writeup
Probs 52, 60,
62—64, 73
Study for Ch
6 Test
Read Ch 7
?’s 1—10
1—5, 7, 8,
10, 12, 13
14—18, 51
19, 23—26,
28
Fg  Fc 
 elliptical
52
53
54
Fg  Fc 
 elliptical
Escape Velocity: Black Holes, Big Bang/Crunch
Kepler’s Laws
“Right Hand Rule” for rotational motion
Start Ch 8: Torque
Recall Chapters 3 & 4: Kinematics, then dynamics.
Chapters 7 & 8 have same progression: rotational kinematics,
then rotational dynamics.
F

Ch 4: a 
Ch 8:  
m
I
Units for I and 
 F d
56, 59, 65
35—39
Ch 7 Probs:
52, 53, 57, 58
Read Ch 8
55
56
57
58
59
60
Only F gives torque.
Ch 8 Reading Quiz
Rotational Equilibrium: Newton’s First Law for Rotational
Motion:   0
How to solve problems: Use three equations ( Fx  0 , Fy  0 ,
&   0 ), then choose a SMART pivot point.
Vocabulary: line of action, lever arm
ms v 2
Lab: verify
 m w g with rubber stopper. Use equation to
r
calculate mass of stopper, then discuss error.
Finish Labs
Ch 7/8 Test
Skip Chapter 9
Chapters 10—12 are Thermodynamics, which will be covered
later
Begin Ch. 13: Waves
Associations? “The wave.” Vocabulary: propagation, medium.
Transverse and Longitudinal Waves: similarities and differences
Thanksgiving Break HW
Proportions: inverse and inverse square relationships
Ch 13 Reading Quiz
Simple Harmonic Motion (SHM)
Review Hooke’s Law: force is a restoring force. What that
means. How to calculate k. Write a descriptive paragraph.
1
Graph of F vs. x leads to U  kx 2
2
As block slides across a flat/level surface attached to a spring
(Figure 13.1), examine x, v, a: are they constant? Where are they
greatest/least?
Relate to circular motion.
Make Graph of PE, KE, and TE as function of x. All on one
graph.
Ch 8 Probs:
3, 4, 15, 17,
20
Ch 8 Probs:
22, 26, 28,
30a, 35
Study for Ch
7/8 Test
Read Ch. 13
1, 2, 4, 5, 7, 9
Worksheet
12, 14, 16,
18, 21
61
62
63
64
65
66
67
68
69
70


k 2
A  x 2 can be derived from
m
1
1
1
conservation of energy: kA2  kx 2  mv 2
2
2
2
Compare circular motion and SHM: SHM video (#76…12 min):
SHM has constant T, even if damped
Equations 13.8—13.11
Review parts of a wave (crest, trough, period (T), frequency (f or
), wavelength ()).
Read section 13.4 and understand equations: x  A cos(  t ) and
x  A cos( 2ft) . Look at figure 13.13. Take f’ and f’’.
How does changing A,  change graphs?
Is a pendulum a SHO? What else is/isn’t a SHO?
Equation: v  
Waves on strings: superposition.
Three things that can happen: reflection, transmission,
absorption. Sum is 100%.
Lab: SHM with hanging spring: predict and measure T. Same or
different when A changes? Pendulum: predict then measure T.
Extra Problems on SHM; Hand out Equation and Data Sheets
(quiz on day 87)
Ch 13 Test
Intro to Thermodynamics (Chapters 10, 11, 12)
Begin Ch 14: Sound
Sound waves: longitudinal (review with slinkey). Regions of
compression and rarefaction.

Speed: v = 
where has to do with elasticity and is

Equation 13.6: v  
T
in Centigrade.
273
Power 1 E
W

Loudness: Intensity: I =
Unit is 2
Area
A t
m
Pitch: Infrasonic, audible (20—20,000 Hz), ultrasonic.
Ch 14 Reading Quiz
 I 
Decibels: intensity level or decibel level,   10 log  
 I0 
W
W
I 0  1  10 12 2 (threshold of hearing). 1 2 is “threshold of
m
m
pain.”
Changes in intensity (X or / 2, or X or / 10) lead to changes in
decibels (+ or – 3, or + or – 10).
Unit for decibels?
26—29, 31
56, 58, 59
30, 32, 33,
35, 37, 38, 54
39, 42, 57, 62
44, 45, 48,
49, 51—53
55, 63, 64, 67
Study
Read Ch 10
Read all of
Ch 14
density. v also equals 331 1 
71
1—3, 6, 8
72
73
74
75
76
77
78
79
80
81
Discuss Review/Presentation days at end of semester. Important
experiments (Millikan and early measurements) and AP FR
problems (2006 #1; 2008 #’s 1, 2, 4, 5; 2008 form B #’s 1, 2, 4,
6). See days 85—87
 v  v0 

Doppler Effect: f   f 
 v  vs 
Decibel quiz.
Interference and standing waves.
Brief review of interference (constructive and destructive).
Introduce , path difference.
Standing waves: show on slinkey and jumprope: nodes and
antinodes. Develop frequency and wavelength equations for
standing waves on strings.
Doppler Quiz.
Standing waves in air.
Equations 14.18 & 14.19
nv
f 
, n  1,3,5,7...
4L
Depending on situation, one is relevant.
nv
f 
, n  1,2,3,4
2L
Vocabulary: overtones and harmonics
Lab: calculate frequency of a tuning fork using pipe in water.
Standing waves quiz.
Finish Lab
Resonance/beats/timbre
Winter Break Homework: Thermodynamics (Quiz day 83)
Back from Winter Break
AP FR problems on Ch 14 (2004 #4 and 1995 #6)
Chapter 14 Test
Ch 15 Reading Quiz
Begin Ch 15
Electric Charges: review basics (p, n, e, etc.) from previous
classes. Unit for charge.
Methods of charging.
Insulators and conductors.
qq
Coulomb’s law: Fe  k 1 2 2
r
Superposition principle (adding forces…remember that forces are
vectors) and problem solving.
Electric Field: concept, direction, unit.
q
F
& Ek 2
E
r
q
Superposition principle applies to fields, too.
10—15
16, 20, 31, 33
39, 40, 45, 51
30, 34—37
58, 60, 63
42—44, 47—
49
Study
Read Ch 15
4, 10, 11, 12,
15
24, 25, 27—
29
Crucial distinction: electric force is not the same as electric field.
82
Quiz on Coulomb’s law and Superposition Principle
Field lines
83
***Thermodynamics Quiz
Conductors in electrostatic equilibrium: know all four points
84
Demo: electroscope. Show and explain.
**Presentation Day (Early measurements of the speed of light and
AP FR Problems: 2006 #1, 2008 #’s 1 & 2)
85
Quarter 2 Unit Quiz
**Presentation Day (Millikan experiment (ignore drag force…just
discuss balance between electric and gravitational forces) and AP
FR Problems: 2008 #’s 4 & 5, 2008 Form B #1)
86
Ch 15 Test
87
Quiz on equation sheet (handed out on day 67)
**Presentation Day (Early measurements of mass and radius of
earth and AP FR Problem: 2008 form B #’s 2, 4, & 6)
88— Final Exams
90
91
Begin Semester 2
Ch 16 Reading Quiz
Define “potential difference.” Look first at gravitational potential,
then electric potential.
Unit for potential, and for potential difference, is the
Joule/Coulomb, or the Volt. (Unit for electric field is still N/C,
but can also be V/m)
Coulomb force is conservative (like gravitational force, but not
like frictional force).
92
qq
q
q
V k
Compare to F  k 1 2 2 & E  k 2 and how to
r
r
r
remember all three.
Potential is a scalar. Why do we care? Superposition principle.
Discuss the sign: W  q(VB  VA )  PE( KE) Relate to
work-energy theorem.
Equipotential surface: requires no work to move along it. Always
perpendicular to field lines. Just like contour lines on a
topographic map.
Odd unit for energy: the electron volt, (eV).
93
Quiz on Superposition Principle.
Q
Capacitance: C 
V
Unit
Ways to draw a capacitor in a circuit: —||— or —|( —
A
How to make a capacitor of a certain capacitance: C   0
d
16, 22, 30—
32
50, 57, 64
Read Ch 16
1, 2, 4, 5, 9,
10
11, 13,
16,17,18, 21
22, 24, 25,
27, 28
A
Q

d V
Circuits: how to draw batteries and wires.
Parallel and series connections: define. Then derive how to find
equivalent capacitance, C eq , for series and parallel.
Sometimes in problems:  0
94
95
96
97
98
99
100
101
102
103
Progression of series circuits (12 V battery: 2 F and 4 F in
series, then 1F, 2F and 4 F in series): find equivalent
capacitance, charge on each capacitor, and V across each
capacitor for each circuit.
Progression of parallel circuits (12 V battery: 2 F and 4 F in
parallel, then 1F, 2F and 4 F in parallel): same as above.
Finally: a) 2 capacitors in parallel followed in series by another 2
capacitors in parallel. b) 2 capacitors in series connected in
parallel with 2 more capacitors connected in series.
Note patterns.
More circuit examples
1
1
Q2
2
Energy stored in a capacitor: QV  C (V ) 
2
2
2C
Quiz on circuit with lots of capacitors. Find everything.
Dielectrics
AP Free Response problem (2002, Form B, #5) on capacitors
Ch 16 Test (may contain a tiny bit of Ch 14 & 15 for Review)
Ch 17 Reading Quiz
Ch 17 and 18 go together: one combined test
Definition of and unit for current.
Drift speed ( I  nqv d A ): what is the meaning & unit for n?
V
Ohm’s Law: V = IR (or, perhaps more intuitive, I  ).
R
Definition of and unit for R.
L
Resistivity,  . R 
(Depends on Temperature as well, but
A
makes the equation more complex.)
Power: IV. (and others from V = IR)
Unit for Power.
What is a kWh?
Resistors in circuits: Derive equations for series and parallel
circuits: relate to equations for capacitors.
Vocabulary: “tripping a circuit breaker”, “power loss due to
resistance.”
Kirchoff’s Rules: junction and loop. (p. 601)
Do problem 47 in class.
What if there are multiple batteries in a circuit?
RC Circuits: Graphs, time constant () = RC (Note error on page
605)
29—32
33—36
37, 43, 44, 57
40—42, 47
Read Ch 17
1—4, 7, 10,
12, 14, 22
31—35
Ch 18 #’s: 6,
7, 9, 11, 16—
18
19, 21, 22,
27, 45, 48
104
105
106
107
108
Voltmeters and Ammeters (How to connect?; high or low
resistance?)
Light bulbs: benefits of parallel vs. series connections. Burnout =
open circuit. Brightness has to do with Power: IV.
More fun circuit problems:
From previous AP Tests: 2003 #2, 2003 Form B #2
Ch 17/18 Combo Test
Ch 19 Reading Quiz
Magnets and their field lines. Earth’s magnetic field. “Big
magnet in earth.” Geographic vs. Magnetic north: declination.
Magnetic fields: exert forces on moving, charged particles.
F  qvB sin 
Unit for magnetic field.
Direction for magnetic force: “right-hand rule.” (Don’t use “rule
#1, #2, etc. when talking about it or on the AP test.)
***Again: force (F) and field (B) are different. Do not say one
and mean the other.
Magnetic force on a wire and torque on a loop.
F  BIl sin  &   BIA sin 
Circular path of charged particles in magnetic fields:
mv 2
Solve for r to get path.
qvB 
r
Mass spectrometer.
Helical (from helix) path?
 I
Current causes a magnetic field: B  0
2r
Summary: Gravitational fields exert forces on all matter.
Gravitational fields are created by all matter.
Electric fields exert forces on all charged matter.
Electric fields are created by all charged matter.
Magnetic fields exert forces on moving charged
matter. (As long as a component of the velocity of the
moving charged matter is perpendicular to the field.)
Magnetic fields are created by moving charged matter.
(And they are directed perpendicular to the velocity of
the moving charged matter.)
Can a magnetic field and an electric field add to zero (cancel each
other out)? Look at units.
Can a magnetic force and an electric force add to zero? See
problem 29: “velocity selector.”
Study for
Test
Read Ch 19
1, 2, 3, 4, 8,
12
13, 14, 19,
23, 24 AP FR
Prob 2008 #3
29—32
109
Magnetic force between two parallel conductors:
Magnetic field inside current loop: B 
0 I
F  0 I1 I 2

l
2d
34, 38, 39,
41, 46—48
2R
Solenoid: B   0 nI
n is turns per unit length, whereas N is total number of turns.
110
Chapter 20
Flux:   BA cos . What is theta?
Induced EMF (EMF is not an F.) or induction:   
111
112
113
114
115
116
117
118
119
120
1, 3, 4, 6, 9,
10, 12
N
(This
t
is called Faraday’s law.)
Lenz’s law. (Relate to Le Chatelier’s Principle in chemistry.)
FR Problems: 2002 #5, 2003 #3, 2003 Form B #4, 2007 Form B
#2
Ch 19/20 Test
Photoelectric Effect: hf    KEmax  eVs (hf is energy of one
photon.
Wave/particle duality: photons have momentum (even though no
mass) and particles have wavelength: de Broglie wavelength:
E 1 hc h
h
E
p  
 leads to:  
& f 
for matter waves
c c  
mv
h
Ch 21 Reading Quiz
Chapter 21, sections 8—13
E = hf, c = f, electromagnetic spectrum, source of EM waves &
antennae, Doppler effect, Maxwell’s equations and the four forces
Continue Ch 21 topics above
Ch 21 Quiz (just sections 8—13 and Photoelectric/de Broglie)
Ch 22 Reading Quiz
Ch 22
3 things light can do at a boundary: reflection, transmission,
absorption
Law of reflection (specular and diffuse both follow it)
Light travels at different speeds in different media:
c
n
Story about the pond on the farm.
v
Definition of refraction. Note two changes: the change in speed
and the change in direction.
Law of Refraction (Snell’s Law): n1 sin 1  n2 sin  2 (note which
angle is angle of incidence)
Total internal reflection and the critical angle (fiber optics)
Wavelength change (frequency is unchanged) in new medium:
14, 15, 16,
23, 27
Study for
Test
Read Ch 21
sections 8—
13
Read Ch 22
6, 7, 21, 23,
24
38, 43, 47, 61
9, 12, 25, 29
n
121
122
123
124
125
126
127
128
129
130
0
n
Dispersion and prisms
Review problems
Ch 22 Quiz
Ch 23 Reading Quiz
Flat Mirrors: Ray diagram with lots of rays to find image
Ray diagram with just two rays to find image
Description of image: upright, virtual, same size (M = 1)
Object distance (p), image distance (q).
h' h
Magnification: M   i
h ho
Spherical and Parabolic Mirrors: similarities and differences.
Spherical aberration.
Concave mirrors:
Ray diagram with lots of rays to show focus.
Ray diagram with two or three rays to find image.
Different locations of object give different locations for image.
Definitions: front/back, reflecting side/non-reflecting side.
Positive and negative values of M, p, q.
Concave mirror summary: different kinds of images possible,
depending on object location.
1 1 1
 
Mirror equation:
p q f
f = R/2
q
h'
M  
h
p
Concave mirror quiz: ray diagrams and/or equations
Convex Mirrors (f is negative)
Only 1 ray diagram. Only 1 type of image, regardless of object
location.
Converging thin lenses
Three shapes, but all do the same things to the light.
Different kinds of images possible, depending on object location.
Sign conventions
What to do on the ray diagram if one of your rays misses the lens.
Convex mirror quiz: ray diagrams and/or equations
Diverging thin lenses
Three shapes, but all do the same thing to light.
Only 1 ray diagram. Only 1 type of image, regardless of object
location.
Begin Mirror/Lens lab
Quarter 3 Unit Quiz
Finish labs
Study
Read Ch 23
1, 3, 4,
Activity 3 on
p. 785
7, 9, 11, 13,
15
18—20, 47
5, 12, 14, 16,
17
29, 33, 35,
38, 41
30, 31, 32,
37, 39
44, 50, 51
21, 22, 26
131
132
133
Images formed by refraction
Labs due
Atmospheric refraction and mirages
Spherical and chromatic aberration
Ch 23 Test
Study for test
Conditions for interference of light: coherent and monochromatic
Young’s double slit experiment and “path difference” 
Stripes or bright and dark “fringes” are created.
  d sin  bright  m

Read Ch 24
sections 1—
4, 6—8
2, 3, 4, 7, 11
1
2
  d sin  dark   m  
134
135
for all 4 equations, m is an integer

L 
1
ydark 
m  
d 
2
L
y bright 
m
d
Phase change upon reflection can cause change in equations from
yesterday.
Thin films.
Recall: wavelength is different in a medium with n  1 :  n 
136
137

12, 13
14, 16, 17, 20
n
Diffraction
Similar to and different from interference pattern.

Single Slit: sin  dark  m
a
d sin  bright  m
Grating:
Review how all the equations from this chapter are placed on the
AP test equation sheet.
Polarization demo.
Minimum Day
Chapter 24 Quiz
Spring Break Homework: Read chapter 9, sections 3—8. Focus
especially on (meaning memorize and be able to use to solve
problems) equations 9.11, 9.12, 9.15, 9.16, and 9.17.
29, 31, 35, 38
Study for
quiz
(5 extra credit points if you go to the Griffith Park Observatory over break.)
138
139
140
Begin Quarter 4
Buoyancy
Spring Break Homework Quiz
Pressure variation with depth
“Hydrostatic pressure” and “Gauge pressure”
Fluid flow continuity
Bernoulli’s equation
AP FR Prob:
2005 #5
AP FR Prob:
2003 #6
AP FR Prob:
2007 #4
141
The Compton Effect: scattering of x-rays (27.5)
h
1  cos 
    0 
me c
142
145
Ch 28
Brief History of models of the atom (Dalton through Bohr)
Atomic energy levels
Ch 29: Nuclear Physics
Nuclear reactions
Conservation of mass (mass # is A) & charge (atomic number is
Z)
Examples: alpha decay: ZA X  ZA42Y  24He
beta decay: ZA X  Z A1Y  e  or ZA X  Z A1Y  e 
Positron
Nuclear reactions: conservation of energy.
Equivalence of mass and energy.
“Rest energy”: E  mc 2
Endothermic and exothermic reactions
AP FR Prob: 2006 #6
146
147
148
149
150
151
152
153
154
155
156
More practice FR Problems from 2009 exam (#’s 4, 5, 6 & 7)
Ch 27—29 quiz
Practice Test: Multiple choice
Go over MC section
Practice Test: Free response
Go over FR section
Review/Practice
Review/Practice
Review/Practice
Final questions and pep talk
AP TEST!!!!!!!!!!!!!!!!!!!!!
143
144
Read Ch 28,
sections 1, 2,
3, & 11, and
Ch 29,
sections 1, 2,
4&6
AP FR Prob:
2005 #7
Ch 29
Problems
25—27
AP FR Prob:
2007 #7 &
2003 Form B
#7
Study for
quiz
Field summary
Gravitational fields exert forces on ALL matter.
Electric fields exert forces on all CHARGED matter.
Magnetic fields exert forces on all CHARGED matter that is MOVING perpendicular to
the field.
Once you get that, it is perhaps not surprising that:
Gravitational fields are caused by the presence of matter. (Any matter.)
Electric fields are caused by the presence of charged matter.
And Magnetic fields are caused by the presence of moving charged matter.
List of Labs
A. Graphs and Tracks *
B. Free-fall Mini Lab
^*
C. Analytical and Graphical addition of vectors techniques
D. Atwood’s Machine
E. Projectile Launcher
F. Is Force a vector?
@
G. Friction lab
H. Centripetal Force
I. Measuring and predicting Spring Constants
J. Acceleration and F = ma
^*
K. Collisions (conservation of momentum and kinetic energy) ^*
L. Roller Coaster Lab (energy conversions and conservation) *
M. Buoyancy
N. Mirrors (finding images and focal lengths) @
O. Lenses (finding images and focal lengths) @
@
^
*
Labs that are Open Ended
Labs that use probeware attached to laptop computers
Labs that use computers