Tutorial 8 (Nov. 2):
T8.1
Homework problem: 18: Reverse osmosis and pressure driven desalination
I discussed this problem and we did most of part (a).
P0=1 atm
The relevant formula for the water pressure at the
bottom of the pipe (depth H) is Pwater = P0
Tutorial 1: (Sept. 14)
Thermal equilibrium of the earth and Global Warming (Problem 1 on Assignment 1):
earth
Input energy is solar radiation: highenergy photons from sun (6000 K):
2
Solar constant= f = 1350 W / m
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Output energy: terrestrial radiation=I
Physics 347
Problem Set 2 Solutions
due: Oct. 8
page 1
6. PKT Problem 3.1 (p. 115) (8 points)
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Suppose the synthesis rate for proteins is ks and the degradation rate is kd.
Then the equation for the total number of proteins N(t) in the cell at time t
Physics 347
Solution Set 4
due: Nov. 8
page 1
Redo the midterm exam and hand it in. (10 points)
It is posted on the web. Just download a clean copy and hand it in with this problem set.
To get the most out of this, I suggest:
Take a quiet moment when you
Dec. 13, 2010
Final Exam Solutions
Physics 347
Your Name: _ Your ID#:_
The Final will run for 180 min.
There are 14 problems with a total of 114 points
Do your work on the pages of the exam.
Please make clear how you arrive at your answers. I cannot give
Physics 347
Solution Set 3
due: Oct. 22
page 1
11. The Gibbs Free Energy:
There is another free energy, which I did not discuss in class. The Gibbs free energy
and is defined as G " E # TS + PV = G (T,P, N ) and has T,P,N as its natural variables.
Note: F
Physics 347
Problem Set 1
due: Sept. 24
1. Heat balance of the earth: the onelayer atmosphere.
In tutorial I showed you how to estimate the heat balance of the earth, first in the
simplest model and then including the effects of the albedo (a) and the at
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Tutorial 6 (Oct. 19): Calculations of Free Energy and Entropy for the ICMG:
Reading Assignment for Lectures 1518: PKT Chapter 7
Problem Set 1 (finally) handed back.
T6.1
1. Discussion of Problem 15.
2. A simple problem in lattice polymers (model for pr
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Tutorial 5 (Oct. 12): Calculations of Free Energy and Entropy for the ICMG:
Reading Assignment for Lectures 1518: PKT Chapter 7
You are not responsible on exams for the details of the calculations below.
Old homework problem discussions: Proble
Tutorial 10 (Nov. 16):
T10.1
PoissonBoltzmann (PB) Equation in spherical geometry and the charge distribution around a
point charge or spherical charge distribution in aqueous solution:
Q
" 2# = $
%
0
= $( q' n' e$ )q' #
&
'
1 d $ d# '
I could just tell
Tutorial 12 (Nov. 30): Charges in electrolytes: Screening or not?
T12.1
PoissonBoltzmann (PB) Equation in spherical geometry and the charge distribution around a
point charge or spherical charge distribution in aqueous solution:

E
E
E
x
Q
r
When the c
Tutorial 7 (Oct. 26):
T7.1
Homework problems: 12, 13(a), and 15 (c).
15(c).
Point here is that you can calculate in any ensemble you want provided N is thermodynamically large;
but, you have to match E in the microcanonical ensemble to E C . To calculate
Physics 347
Solutions to Problem Set 6
due: Dec. 6
page 1
26. (12 points) Redcell lysis pressure.
At issue in this problem is the degree of osmotic imbalance allowed by the redcell membrane.
If the red cell is exposed to a hypotonic environment (one wit
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Physics 347
Solution Set 5
due: Nov. 22
page 1
21. (8 points) This problem is a small generalization of Example 4 in Lect. 23.2.
Consider a lattice polymer (cubic lattice) with immediate reversal forbidden, as in example 4, but now
assume that there
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Tutorial 3: (Sept. 28)
Reading Assignment for Lectures 1012: PKT Chapter 6
You are not responsible on exams for the details of the calculations below.
T3.1
1. Gameshow problem on next homework
2. Deriving Stirlings Formula:
A key ingredient is an in
Physics 347
Midterm Solutions
Oct. 29, 2010
Your Name: _ Your ID#:_
The Midterm will run for 50 min.
There are five problems with a total of 50 points. Each problem counts for 10 points; however, they are not
of equal difficulty.
Do your work on the pages