Physics 132

Homework

Part of the weekly homework assignment is in Canvas, and part will be done on paper and handed in in class.

NOTE: The homework will be scanned to guard against lost papers. As a result it is very important that you DO NOT STAPLE OR ATTACH YOUR PAGES IN ANY WAY. If you do so, the scanner may destroy them. Also, if you have torn your pages out of a spiral bound notebook, please remove the perforations.

The online homework is due on Friday at 9 PM and the paper homework is due at the beginning of the last lecture of the week (Thursday at 12:30).

Solutions are posted Sunday at noon after the homework is due on Canvas under Files. No late homework can be accepted after solutions are released.

The weekly homework will ask youto do 3-5 challenging problems including estimations, explanations, essay questions, worked out problems, and even some challenging multiple choice questions. You are encouraged to work on these with friends. The course center is a good space to work together and get feedback from a TA or Professor. CLICK FOR THE COURSE CENTER SCHEDULE.

You have to write up your solutions independently. Be careful: If two or more submitted answers are essentially identical, neither will receive credit. If your solution is essentially identical to one found on the web, you will receive no credit and all your previous answers will be searched to see if they are also copied. Credit for those found to be copied will be removed. 

Some of the ExpertTA problems (mostly multiple-choice and those with numerical or symbolic answers) will be computer-graded, some will be graded for correctness by a human, and some won't be graded (and you'll just get points for completion). However, we won't tell you ahead of time which problems will be graded, so you'll have to do your best on all of them! For the problems that are only graded for completion, make sure you look at the solution afterwards (posted on ELMS); don't let your perfect score on that problem (based on completion) fool you into thinking you did it correctly. (Maybe you did do it correctly, but it's good to confirm that.)

The links below are to pre-XTA versions of the problem that will let you see and explore the problems outside of the XTA environment. Be sure you check that you do the XTA versions when you submit on line, since the questions may not be exactly identical.

When you get your homework comments back, they may contain otherwise-unexplained letters. These are grading codes, and there's a key to them here.

 

Due date
(Fri)
Online HW
(due at 9 PM)
Paper Hand in HW
(due Beginning of last
Lecture of the week)


HW 01

(2/7)

1. Chemical reaction in a closed container
2. Following a rocket
3. An unstable chemical
4. The macro micro connection

What if the Greenland ice sheet melts?


HW 02

(2/14)

1.  Distributing energy packets
2. Counting degrees of freedom 
3. Entropy in heat flow
4. Two equations with heat and temperature 
5. Finding a small tumor 

The exponential function


HW 03

(2/21)

1. Evaporating a membrane
2. Molecular polymorphism
3. Free energy of mixing in non-isothermal free expansion
4. Dimensions of electric quantities


Details on dipoles


HW 04

(2/28)

1. How big is a byte?
2. What's a field?
3. Charge on a neuron
4. Potential near a long molecule
5. Electric potential in a cell membrane
Potential from a water molecule


HW 05

(3/13)

1. Nernst potential toy model
2. Why Debye?
3. Capacitors in series and parallel
4. Both ions moving
5. A battery and four bulbs
No paper: All problems on XTA this week


HW 06

(4/3)

1. Lots of batteries and a bulb
2. Cell membrane model
3. The resistance of a pocket calculator
4. Contemplating Kirchhoff
5. The Pi network

No paper this week:
All HW on XTA


HW 07

(4/10)

1. Defibrillators
2. Constant current source
3. Where's the force?
4. Diatomic vibrations
5. The online mass-spring lab
No paper this week:
All HW on XTA

HW 08

(4/24)

1. SHO Energies
2. The resonance simulation
3. A bobbing bottle
4. Springs and strings
5. Graphing a pulse on a string
Evolving an eyeball
To be submitted as a file on ELMS

HW 09

(4/30)

1. Equations for sinusoidal waves
2. Pulse at a boundary
3. Adding pulses
4. Tuning a harp string
5. Where can you see the bulb?
6. The diverging lens

No paper this week:
All HW on XTA

HW 10

(5/7)

 

University of Maryland Last revision 4/16/20