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Chaisson and McMillan - Astronomy: A Beg. Guide 3/ (Homework)

James Finch

Astronomy, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 0/7

Due: Saturday, October 16, 2010 08:30 EDT

About this Assignment

Question
Points
1 2 3 4 5
0/2 0/2 0/1 0/1 0/1
Total
0/7

Description

Here are some textbook questions from Astronomy: A Beginners Guide to the Universe 3/e by Chaisson and McMillan published by Prentice Hall. Click here for a list of all of the questions coded in WebAssign.


Instructions

This demo assignment allows many submissions and makes the answer key available after the first submission so you can see the correct answers. (Typically, the answer key is posted after the due date!)



1. –/2 points Notes Question: BG3 1.P.02.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
To an observer on Earth, through what angle will Mars appear to move relative to the stars over the course of 24 hours, when the two planets are at closest approach?
Enter a number.
°
Take Earth and Mars to move on circular orbits of radii 1.0 A.U. and 1.5 A.U., respectively, in exactly the same plane. Will the apparent motion be prograde or retrograde?
    



2. –/2 points Notes Question: BG3 2.TB.093.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
Total
0/2
 
Can we be sure whether or not the Andromeda Galaxy exists today?
    


Why or why not?


3. –/1 points Notes Question: BG3 3.P.05.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
The photographic equipment on a telescope is replaced by a CCD. If the photographic plate records five percent of the light reaching it but the CCD records 75 percent, how much time will the new system take to collect as much information as the old detector recorded in a three-hour exposure?
Enter a number.
 minutes

4. –/1 points Notes Question: BG3 4.TB.104.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Which planets have no known moons?




5. –/1 points Notes Question: BG3 8.P.04.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Assuming a spherical shape and a uniform density of 2000 kg/m3, calculate how small an icy moon of one of the outer planets would have to be before a fastball pitched at 20 m/s could escape.
Enter a number.
 km
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