ChemPhys 273
 Semester
Review
Second
Semester,
20132014
Background
Information
The physics exam for ChemPhys 273 will be held during the
50minute class period on Tuesday, June 3. The exam will be a
50minute exam covering all topics learned during the second semester
and perhaps a few other concepts which were learned during the other
three semesters of the course but have relevance to second semester
topics (e.g., kinematic equations, acceleration, Newton's laws,
etc.). The exam will be started the moment you enter the room and
will be collected at the end of the 50minute period. In addition to
the 50 minutes exam, there will be an additional 15minute portion of
the exam that will include two reading passages. Extra time will
not be alloted on these exams. If there are special circumstances that
require that
you are permitted additional time, then see Mr. Henderson privately
before the
day of the exam to discuss those circumstances and to make arrangments.
Most of the approximately 60 questions are multiplechoice.
There
are approximately 8 short computational questions which are not
multiple choice; credit is only given for the correct answer with the
unit. All questions are worth the same amount of points. Many of the
multiple choice questions include up to 10 possible choices  from
a through e
and such choices as ab,
ac, ad,
etc. Planning to guess on questions is unlikely to be a wise
alternative to planning to prepare. Each section/Mods will have a
separate form of the exam with nearly identical or at least very
similar questions. The exam is not likely to be curved; it would not
be surprising if there were a few perfect or nearperfect scores.
Your exam score in physics will be averaged with your exam score in
chemistry. This averaged score will comprise 20% of your semester
grade in ChemPhys.
Contents of Exam
There are a little less than 60 multiple choice and short
computational
questions on the final exam. The questions cover the following
topics:
Topics

Approx.
# of Qs

Kinematics,
Newton's Laws Applications, and Static Electricity:
 Using kinematic equations to calculate how far, how
fast, or how much time would be associated with a given 1dimensional
motion.
 Acceleration  the rate of change of velocity.
 Newton's first law  concept of inertia; relationship
to mass
 Newton's second law  factors affecting acceleration;
meaning of net force; simple computations
 Newton's third law  actionreaction; identifying
force pairs in an interaction
 Freebody diagrams and analysis  computing
acceleration from known force values or determining an individual force
value from a known acceleration
 Applications of Newton's laws to circular motion;
direction of v, a, and F; centripetal force and inertia; F_{net}
= m•a problems
 Charge interactions between like and
oppositecharges, etc.
 Conductors vs. insulators
 Methods of charging objects  friction, conduction
(contact) and induction
 Grounding
 Polarization
 Electric force and Coulomb's law calculations
 Electric field  definition/concept, equation, units,
simple computations

8 Qs

Work and
Energy:
 Work  definition, equation, units, simple
computations
 Power  definition, equation, units, simple
computations
 Potential energy  definition, equation, units,
simple computations
 Kinetic energy  definition, equation, units, simple
computations
 Workenergy relationship; conservative vs.
nonconservative forces; workenergy equation and its use in solving
problems
 Workenergy bar charts
 Conservation of energy  equation

18 Qs

Momentum
Conservation and Collisions:
 Momentum  definition, equation, units, simple
computations
 Impulse  definition, equation, units, simple
computations; relationship to momentum change
 Newton's third law  relationship to collisions
 Momentum conservation; isolated systems; use of p
conservation in analysis of collisions
 Elastic collisions vs. inelastic collisions; criteria
for each; mathematical analysis
 Twodimensional collisions; vector/mathematical
analysis

17 Qs

Electric
Circuits:
 Electric potential  definition, equation, units,
simple computations; relationship to potential energy and to current,
resistance, power, etc.
 Two requirements for a circuit
 Current  definition, equation, units, simple
computations; relationship to voltage, resistance, power, etc.
 Resistance  definition, equation, units, simple
computations; variables effecting the amount of resistance in a wire;
relationship to voltage, current, power, etc.
 Power  definition, equation, units, simple
computations; relationship to energy, voltage, resistance, current, etc.
 Energy  power  cost calculations
 Series circuits  diagrams; definitions; equivalent
resistance; rules regarding current and voltage for entire circuit and
for individual resistors
 Parallel circuits  diagrams; definitions; equivalent
resistance; rules regarding current and voltage for entire circuit and
for individual resistors

15 Qs

Several of the questions require the use of a calculator;
complex
analysis are uncommon (if present at all). Many quantitative
questions are accompanied by a diagram  e.g., a pre and
postcollision diagram or a circuit diagram  which forms the basis
of the computation. When a calculation is involved, it is usually a
straightforward calculation (there are only a few blue
problems). Lots of questions can be answered quickly. Many questions
are easy to very easy, others are of medium difficulty, few are
complex, and none are impossible. The questions are
much more
general than what you would normally find on unit tests; small
nuances are not the focus of the exam. Keep in mind that all
questions are worth the same number of points; so do not blow 10
minutes trying to solve an elastic collision problem at the expense
of other easier questions. If such a problem is that difficult for
you, then count it as a loss and continue on with
those
questions which you do know. Return to the troublesome questions at
the end of the test.
The following math equations will be provided on the test:
d = [(v_{i} + v_{f})
/ 2] • t

d = v_{i} • t + 0.5 • a • t^{2}

v_{f} = v_{i}
+ a • t

v_{f}^{2} =
v_{i }^{2} + 2 • a • d

F_{net} = m • a

F_{frict} = mu • F_{norm}

SOH CAH TOA

PE = m • g • h

KE = 0.5 • m • v^{2}

W = F • d • cos(Theta)

P = W / t

KE_{i} + PE_{i}
+ W_{nc} = KE_{f} + PE_{f}

F • t = m • (Delta v)

p = m • v

I = Q / t

V = (Delta PE) / Q

Q_{electron} = 1.6 • 10^{19}
C

P = I • V = (Delta E) / t

R_{eq} = R_{a}
+ R_{b} + R_{c} + ...

1/R_{eq}=1/ R_{a}
+1/ R_{b}+1/ R_{c} + ...

V = I • R

How to Prepare
There are numerous ways to prepare for the test. The best ways
are
those which help you learn the material. This will be different for
differnt learners with different learning styles. The main thing is
to devote some time to the preparation process. There are numerous
preparation tasks which can be done, all of which should help. The
following provides some ideas:
 Use the Unit Review sheets from The
Review Session for each of the units which we have completed.
 Review old quizzes (but do note that there are many topics
on the final which were not on quizzes).
 Use The
Physics Classroom or the Multimedia Physics Studios
to review topics which you have difficulty with or merely need to
review.
 Use the Minds
On Physics section of the site. There would be no need
to keep records of your progress.
 Review sections of your book and use the Reading Sheets from
the packet to assist in your review.
 Review concept sheets from the packet and sample problems
done in class.
 Review the major types of calculations that are performed
with the equations listed above.
 Never underestimate the power of a good night's sleep on the
evening before an exam. This may mean that you will have begin
preparations several days in advance.
Some absolute imperatives include:
 Know what each symbol in the given equations stand for;
questions about what a symbol means or represents will not be answered
on the test.
 Have a strong idea of what each type of problem might look
or sound like and of how to analyze it. When the problem appears, you
will need to have an instant understanding of how to approach the
problem and of what equations to use. (For instance, you ought to know
what an elastic collision problem looks or sounds like; and you ought
to be familiar with the problem solving approach. Then if it shows up,
you can quickly procede with your strategy to answer the question.)