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Chaisson and McMillan - Astronomy Today 6/e (Homework)

James Finch

Astronomy, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 3/16

Due: Tuesday, November 2, 2010 07:30 EDT

Question
Points
1 2 3 4 5 6
0/1 0/1 1/2 0/9 0/1 2
Total
3/16

Description

Here are some textbook questions from Astronomy Today 6/e by Chaisson and McMillan published by Addison Wesley. 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. 0/1 points All Submissions Notes Question: AT6 1.P.08.
Question part
Points
Submissions
1
0/1
1/50
Total
0/1
 
A surveyor wishes to measure the distance between two points on either side of a river, as illustrated in the figure. She measures the distance AB to be 160 m and the angle at B to be 35°. What is the distance between the two points?
Enter a number.
Your answer is incorrect. m


2. 0/1 points All Submissions Notes Question: AT6 2.P.03.
Question part
Points
Submissions
1
0/1
1/50
Total
0/1
 
Using the data in the table, estimate the minimum possible distance between Saturn and Earth.
Enter a number.
Your answer is incorrect. AU


3. 1/2 points All Submissions Notes Question: AT6 3.RD.20.
Question part
Points
Submissions
1 2
0/1 1
0/50 4/50
Total
1/2
 
If Earth were completely blanketed with clouds and we couldn't see the sky, could we learn about the realm beyond the clouds?


What forms of radiation might be received? (Select all that apply.)

Your answer is correct.




4. –/9 points Notes Question: AT6 4.P.07.
Question part
Points
Submissions
1 2 3 4 5 6 7 8 9
0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50 0/50
Total
0/9
 
Calculate the wavelength and frequency of the radiation emitted by the electronic transition from the tenth to the ninth excited state of hydrogen.
wavelength
Enter a number.
µm
frequency
Enter a number.
MHz
In what part of the electromagnetic spectrum does this radiation lie?
    



Repeat the question for transitions from the 100th to the 99th excited state.
wavelength
Enter a number.
cm
frequency
Enter a number.
MHz
In what part of the electromagnetic spectrum does this radiation lie?
    



Repeat the question for transitions from the 1000th to the 999th excited state.
wavelength
Enter a number.
m
frequency
Enter a number.
MHz
In what part of the electromagnetic spectrum does this radiation lie?

5. –/1 points Notes Question: AT6 5.P.11.
Question part
Points
Submissions
1
0/1
0/50
Total
0/1
 
Based on collecting areas, how much more sensitive would you expect the Arecibo telescope (diameter = 300 m, Figure A) to be, compared with the large telescope in Figure B (diameter = 105 m)?
Enter a number.

Figure A

Figure B


6. 2/2 points All Submissions Notes Question: AT6 6.RD.14.
Question part
Points
Submissions
1 2
1 1
1/50 1/50
Total
2/2
 
Which planets have been visited by spacecraft from Earth? (Select all that apply.)

Your answer is correct.



On which ones have spacecraft actually landed?

Your answer is correct.