Solution
s
Physics 213
Problem 1
Colliding Blocks and Internal Energy
Week 1
A 2 kg block having an initial kinetic energy of 16 J collides with a 6 kg block initially at rest.
KEi = 16 J
2 kg
6 kg
a) What is the initial momentum of the moving block?
KE =
Physics 213
Last Name:
Discussion Section:
Midterm Exam
First Name
Discussion TA Name:
Fall 2014
NetID
Instructions
Turn off your cell phone and put it away.
Keep your calculator on your own desk. Calculators may not be shared.
This is a closed book exam.
Solution
Physics 213
Problem 3
Pressure Demonstration
h1
Week 1
h2
t
t
F
<F>
The drawing shows the apparatus we use in lecture to demonstrate how a gas exerts a pressure
on the walls of its container. A total of 228 ball bearings take 18 seconds to cascad
Solution
Physics 213
Problem 2
Energy sources: Coal
Week 6
A power plant burns coal to heat a boiler to 450 C. The waste heat leaves via a cooling tower at
60 C.
a) What is the highest percentage of the chemical energy (released
by burning the coal) that
Physics 213
Problem 2
Boltzmann Distribution in atoms
Week 5
Its often useful to remotely sense the temperature of objects. Fortunately the Boltzmann
distribution of the occupancy of atomic states manifests itself in the spectrum of light emitted
from hot
Physics 213.
Practice Final Exam
Spring 2006
The next two questions pertain to the following situation:
Consider the following two systems:
A: three interacting harmonic oscillators with total
energy 6.
B: two interacting harmonic oscillators, with total
Solution
Physics 213
Problem 1
Heat Pump
Week 6
In the winter you probably want to heat your home. Although we traditionally think of heat as
only flowing from hot to cold (e.g., from inside your cozy home to the wintry outside), we also
know that we can
The next four problems are related.
'consider a sealed container with a volume of 1 m3 filled with lx1023 helium atoms and
2x1023 molecules of nitrogen. Recall that helium is a monatomic gas and nitrogen is a
diatomic gas. Initially the temperature of the
1. A circular rod of length L = 2 meter and diameter d=2 cm is composed of a material
with a heat conductivity of = 6 W/m-K. One end is held at 100 C, the other at 0 C.
At what rate does the bar conduct heat?
a) 0.09 W
b) 0.18 W
c) 300 W
d) 0.0009 W
e) 0.
When you take the test
Read each problem carefully. Dont answer the wrong question.
Precisely state the question using the distinctions weve developed in
the course
Draw a picture, visualize the physics.
What do you think the answer is, intuitively?
Use t
Halal
University Dining
Tentative Launch Date: Tuesday. September 12 th , 2016
IKE, ISR @ dinner & PAR @ Late Night
Learning Objectives
Defining Halal
Certification
Ordering Halal Ingredients in Residential Dining
Storage of Halal Ingredients
Cooking Hala
Physics 213
Last Name:
Discussion Section:
Midterm Exam
First Name
Discussion TA Name:
Fall 2014
NetID
Instructions
Turn off your cell phone and put it away.
Keep your calculator on your own desk. Calculators may not be shared.
This is a closed book exam.
Physics 213
Midterm Exam
Spring 2014
The next two problems are related.
Radon is a radioactive noble gas (atomic weight 0.222 kg/mole) that leaks from the ground and often gets trapped
in homes.
1. What is the average translational kinetic energy of a sin
Answer Key: Physics 213 - Midterm Exam - Spring 2014
1. b
2. a
3. e
4. b
5. c
6. b
7. b
8. c
9. b
10. a
11. b
12. c
13. b
14. c
15. a
16. a
17. a
18. a
19. a
20. c
21. d
22. a
23. a
24. a
Physics 213.
Last Name:
Discussion Section:
Practice Final Exam
First Name
Discussion TA Name:
Spring 2006
NetID
Instructions
This is a closed book exam. You have two hours (120) minutes to complete it.
1. Use a #2 pencil. Do not use a mechanical pencil o
Physics 213
Last Name:
Discussion Section:
Final Exam
First Name
Discussion TA Name:
Spring 2014
NetID
Instructions
Turn off your cell phone and put it away. This is a closed book exam.
You have 2 hours (120 minutes) to complete it. This is a multiple cho
Answer Key
Physics 213
1. c
2. b
3. b
4. e
5. c
6. d
7. d
8. a
9. d
10. b
11. c
12. b
13. e
14. c
15. a
16. e
17. c
18. d
19. b
20. b
21. a
22. a
23. a
Midterm Exam
Fall 2014
Physics 213.
Practice Final Exam
Spring 2013
The next two questions pertain to the following situation:
Consider the following two systems:
A: three interacting harmonic oscillators with total energy 6.
B: two interacting harmonic oscillators, with total
!NLLL
N
!22
4
C6
N,L
Solution
(4,2) = 6:
AB
CD
AC
BD
AD
BC
BC
AD
BD
AC
CD
AB
This can be solved using the binomial formula,
because each particle has two choices.
Many systems are described by binary distributions:
Random walk
Coin flipping
Electron sp
1. A circular rod of length L = 2 meter and diameter d=2 cm is composed of a material
with a heat conductivity of ! = 6 W/m-K. One end is held at 100 C, the other at 0 C.
At what rate does the bar conduct heat?
a) 0.09 W
b) 0.18 W
c) 300 W
d) 0.0009 W
e)
Thermal
Heat Engines
p
Closed thermodynamic cycles
system, hot reservoir, cold reservoir
each point on pV diagram is a state of system
same system entropy at point 1
work is area of cycle points on pV diagram
2
3
Efficiency is work done divided by heat de
The next four problems are related.
Consider a sealed container with a volume of 1 m3 filled with x helium atoms and
x molecules of nitrogen. Recall that helium is a monatomic gas and nitrogen is a
diatomic gas. Initially the temperature of the gas mixtur
Physics 213
Last Name:
Discussion Section:
Midterm Exam
First Name
Discussion TA Name:
Spring 2015
NetID
Instructions
This is a closed book exam. You have ninety (90) minutes to complete it.
1. Use a #2 pencil. Do not use a mechanical pencil or pen. Darke
Answer Key
Physics 213
1. c
2. b
3. c
4. c
5. d
6. c
7. b
8. a
9. a
10. b
11. a
12. a
13. d
14. a
15. d
16. c
17. a
18. a
19. b
20. a
21. c
22. a
23. a
24. a
25. a
Midterm Exam
Spring 2015
Physics 213 Sample Final Exam
(34 questions)
The grading button and a description of the scoring criteria are at the bottom of this
page.
True-false questions are worth 2 points each, three-choice multiple choice questions are
worth 3 points each, five-ch
PHYS 213 - Midterm Exam
Midterm Exam - November 7 @ 7 pm (~1.5 weeks away)
Exam content
- Lectures 1-12 (material from 11/7 is not in play)
Exam Practice - previous midterms available on the course webpage
Exam Location - find your exam room on the course
Ouch.
None.
null.
.
Will we have a curve in this midterm:(
to be decided
Can we have a session where we go over the midterm exam/work those solutions?
I will likely go over a small handful of the harder questions from the midterm
in class
Lecture 14, p 1
* On the homework question about sun spots, we are told to ignore n>2. Is this
because P(n>2) makes a negligible contribution to Z? Why can't we say Z=1
for both T=5900K and T=4300K?
* The Spring 2015 midterm has a question (7) asking for the Q of the gas
March and 7 speakers
The March for Science: Champaign-Urbana is a sister march of the March for Science
in D.C. We march to support ethical research practices in scientific communities.
We march to support people who work and participate in science commun
Note: Change to HW & quiz #5 due date
Lecture 15
Heat Engine Cycles
(from last time)
Available Work and Free Energy
U
F
F
U
-TS
pls help. my prelecture is not functioning. any pieces of advice?
Can you please upload the midterm scores by Friday's lectur
Lecture 16
Equilibrium and Chemical Potential
Free Energy and Chemical Potential
Simple defects in solids
I just found out that this class got removed from the required classes list for my
degree to graduate. How can I stay motivated?
On the last quiz (
Miscellaneous Notes
The end is near dont get behind.
The PHYS 213 final exam times are
* 8-10 AM, Friday, May 5
Use the grade book to sign up for which one you want
* 1:30-3:30 pm, Thursday, May 11
Homework 6 is due Wednesday, May 3 at 8 am. (NO late tu