Assignments must be handed in at the beginning of class
PLEASE ENSURE THAT YOU DO THE ASSIGNMENT YOURSELF -- WE SHOULD NOT BE RECEIVING ASSIGNMENTS THAT LOOK THE SAME, THANK YOU
Assignment 1: Assigned: Monday, Sept. 17, Due: Tuesday, Sept. 25
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While visiting Yelloknife, N.T., you see a
'coronal'
aurora (see picture below), i.e. an aurora that originates from directly overhead and streaks down around
you at all azimuthal angles. If the specific intensity of the aurora can be approximated
by the function, Iν = Iν0 cos(θ), where θ is the zenith
angle, and the emission extends to a maximum of
θ = 45 degrees, find a simple expression for the flux density
of the aurora in terms of Iν0. Specify the cgs units of Iν0 and the flux density.
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Do problems:
1.1, 1.3 (assume that the cell phone emits uniformly over the bandwidth), 1.7, 1.11 (change the payload to 800 kg), |
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Assignment 2: Assigned: Tuesday, Sept. 25, Due: Wednesday, October 3
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Do problems: 1.17, 2.6, 2.8, 3.5, and 3.6 Students may hand in their assignments no later than 11:30 a.m. Thursday, Oct 4. Please deliver them to my office at 308E Stirling (mailbox in door).
Assignment 3: Assigned: Wednesday, October 3, Due: Wednesday, October 10
Thanksgiving is Monday, October 8 -- no class
Do problems: 3.8, 4.3, 4.6, 4.7, and 4.9 (I will not be able to go over material related to question 4.9 until Tuesday, but if you wish to get a start on it, see Example 4.4 in the text)
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Assignment 4: Assigned: Wednesday, October 10, Due: Wednesday, October 17
Do problems: 5.1, 5.6, 5.8, 5.9, and 5.10
Assignment 5: Assigned: Wednesday, October 17, Due: Wednesday, October 24
Do problems: 5.14, 6.1, 6.2, 6.3, and 6.5 I am extending the deadline for this assignment to Tuesday, October 30
Midterm Break is Thursday and Friday, October 25 and 26th
Assignment 6: Assigned: Monday, October 29, Due: Tuesday, November 6
Do Problems: 7.4, 7.5, 7.12, 7.17, and 8.2
Assignment 7: Assigned: Tuesday, November 6, Due: Wednesday, November 14
Do Problems: 8.3 (you will need eqn. 8.6 for this problem), 8.6, 8.8, 8.10 a) and b) only, 8.12
Assignment 8: Assigned: Wednesday, November 14, Due: Wednesday, November 28
#1. Do problems 8.13
#2. In the following assume pure hydrogen and compute the thermal line width (in km/s). For each, specify whether the cloud would be molecular, atomic, or ionized.
a) A cloud at T = 90 K.
b) A cloud at T = 10,000 K.
c) A cloud at T = 10 K.
#2. In the following assume pure hydrogen and compute the thermal line width (in km/s). For each, specify whether the cloud would be molecular, atomic, or ionized.
a) A cloud at T = 90 K.
b) A cloud at T = 10,000 K.
c) A cloud at T = 10 K.
#3. If the velocity of any part of a cloud exceeds the sound speed, a shock wave will result. The sound speed is given by cs=[(5/3)kT/(μmH)]1/2, where μ is the mean molecular weight, k is Boltzmann's constant and mH is the mass of a proton. For the 3 clouds of Problem #2, determine whether there should be shocks in the cloud.
#4. Do problem 9.9