Homework

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

The WebAssign homework is due on Friday at 5 PM and the paper homework is due at the beginning of the last lecture of the week.

Please note that WebAssign has some quirky rules for what can be entered where. If it is not accepting your answer check out: Answers that cannot be understood. Please follow the instructions for the problems that are given in the WebAssign environment. The links below are to public forms of the problem and may not include specialized WebAssign instructions.

You will be asked to do 4-6 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. 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 WebAssign problems (mostly multiple-choice) 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.)

So you got your homework back and you see (especially on ones you lost points) some funny letters, like some kind of code. Here's what those letters mean. The burden of figuring out where you went wrong is on your shoulders, but if the code isn't helping you, bring your confusion to the Course Center.

Due date
(Fri)		 Online HW
(due at 5 PM
on Friday )		 Paper Hand in HW
(due Beginning of last class of the week)


HW 01

(2/5)

 1. Enthalpy for a simple reaction
2. Burning hydrogen
3. Getting energy from ATP
4. A homeopathic drug		 Energy in photosynthesis: light and dark reactions


HW 02

(2/12)

1. Entropy in heat flow
2. Two equations with heat and temperature
3. Flipping the second law
4. Distributing energy packets

What if the Greenland ice sheet melts?


HW 03

(2/19)

1. Evaporating a membrane
2. Equations in math, equations in physics
3. Population growth 1
4. Molecular polymorphism

Free energy in free expansion


HW 04

(2/26)

 1. Evolution and the second law
2. Charge on a neuron
3. The Faraday
4. Fields and potentials near points and sheets 		Charges, Fields and Potentials


HW 05

(3/11)

 1. Orienteering in an electric potential
2. Nernst potential essay
3. Capacitance in nerve cells
4. The power of a nerve		 Capacitors in series and parallel


HW 06

(3/25)

 1. Nernst potential toy model
2. Comparing capacitors 3
3. Capacitance dimensions
4. Both ions moving		 Tracking round a circuit 2

HW 07

(4/1)

1. Modeling a nerve membrane
2. Removing a bulb
3. Current flow analogies
4. The resistance of a pocket calculator

 Thinking about an ammeter and a voltmeter

HW 08

(4/8)

 1. SHO variables
2. Diatomic vibrations
3. Oscillating energies
4. Comparing the mass-on-spring and pendulum: 2		 The resonance simulation

HW 9

(4/22)

 1. Standing and traveling waves
2. Action potentials on an axon
3. Springs and strings
4. Tuning a harp string		 Fourier construction of wave shapes

HW 10

(4/29)

 1. On the mirror
2. More moving pulses
3. Flame test
4. Photon transitions

Equations for sinusoidal waves

and

Intensity of light in media -- Beer's law

HW 11

(5/6)

 1. Laser eye surgery
2. Who sees what?
3. Failure of the ray model
4. X-ray crystallography
 The lit-unlit bulb
University of Maryland