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Assignments Fall 2018

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

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.
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),


Picture

Assignment 2: Assigned: Tuesday, Sept. 25, Due: Wednesday, October 3

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)

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.
#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
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  • Home
  • Publications
    • Book Reviews
  • Research
  • Teaching
    • Phy 315 Observing Project - 2021
    • Phy 372 Winter 2019 >
      • Phy 372 Assignments
      • Phy 372 Notes
      • Phy 372 Solutions to Numerical Problems
    • Physics 813 >
      • Presentations
      • Final Exam Schedule
      • Assignments >
        • Assignment 1
        • Assignment 2
        • Assignment 3
        • Assignment 4
    • Physics 435/815 Fall 2019 >
      • Course Outline F19
      • Phy 435/815 Problem Sets F19 >
        • Graduate Student Presentations F19
  • Personal
  • Contact
    • Physics 315 Fall 2018 >
      • Observing Project
      • Summary_evaluation_F18
      • Assignments_F18
      • Observing Project F18
      • Lecture Notes F18
      • Exam Info F18