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Schneider and Arny - Pathways to Astronomy 1/e (Homework)

James Finch

Astronomy, section 1, Fall 2011

Instructor: Dr. Friendly

Current Score : 0 / 9

Due : Tuesday, December 13, 2011 08:30 EST

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

  • Description

    Here are some textbook questions from Pathways to Astronomy by Stephen Schneider and Thomas Arny published by McGraw-Hill. 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!)

Assignment Submission

For this assignment, the number of submissions for each answer box is counted independently. The number of submissions remaining changes only if you submit a new or changed answer.

1. –/1 points Notes Question: SAstro1 11.TY.03.
Question part
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0/1
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0/1
 
Occam's razor is used to do which of the following?
    

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2. –/1 points Notes Question: SAstro1 15.TY.02.
Question part
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1
0/1
0/50
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0/1
 
Which of the following cases does not describe an acceleration?
    

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3. –/1 points Notes Question: SAstro1 18.P.03.
Question part
Points
Submissions
1
0/1
0/50
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0/1
 
What is the escape velocity from a galaxy at a radius of 35,000 ly if the mass of the galaxy is 1012?
Enter a number.
 m/s
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4. –/2 points Notes Question: SAstro1 46.P.01.
Question part
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1 2
0/1 0/1
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0/2
 
Metis, Amalthea, and Thebe orbit at distances of 127,960, 181,300, and 221,900 km from Jupiter's center. Calculate how many times longer Amalthea and Thebe take to orbit Jupiter than Metis. (Hint: You do not need to know Jupiter's mass to calculate the relative times.)
Amalthea
Enter a number.
 times
Thebe
Enter a number.
 times
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5. –/4 points Notes Question: SAstro1 79.P.03.
Question part
Points
Submissions
1 2 3 4
0/1 0/1 0/1 0/1
0/50 0/50 0/50 0/50
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0/4
 
What wavelength would visible light (400-700 nm) have if it were seen from a galaxy formed just 800 million years after the Big Bang? (Refer to Table 79.1)
Enter a number.
 nm to
Enter a number.
 nm
What if it came from matter when the universe was just 400,000 years old?
Enter a number.
 nm to
Enter a number.
 nm

Table 79.1

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