Astronomy 1
Winter 2006
Written Homework Assignment #2

Due Friday, January 27, 2006, at 3:30 p.m.

There are 100 homework points on this assignment. It is worth 1.875 percent of the total points for the course.

For a printable version of this page, click here

INSTRUCTIONS: There are 10 questions on this assignment. All of the questions are from Freedman and Kaufmann, UNIVERSE, 7th edition.

There are two ways you can find these questions in the UNIVERSE eBook:

If the problem has a numerical answer, you can see the correct answer by clicking on [Show Solution]. (You will be graded on the steps you take to get the answer.)

eBook tip: As you work through an assignment, the eBook can help you keep track of your work. In the Questions and Projects section of each chapter, click the "[Answer Field]" links to drop down answer fields for each question. Enter an answer and it will automatically be saved to the server, so that if you come back to the site later your answer will be right there. (Your answer is saved as soon as you click anywhere outside the answer field.) Click the "[Show Printable]" link in the right margin of the page to show all your answers for the chapter in a new, printable, window.

When writing up your solutions on paper, be sure to follow the guidelines on the Astronomy 1 Homework Assignments page (click here). In particular, be sure to SHOW YOUR WORK on all calculations.

Click here for where you are to hand in your homework.


1. UNIVERSE, Chapter 4, Question 17, page 87.

2. UNIVERSE, Chapter 4, Question 21, page 87.

3. UNIVERSE, Chapter 4, Question 36, page 87.

4. UNIVERSE, Chapter 4, Question 39, page 87.

5. UNIVERSE, Chapter 4, Question 43, page 88. (HINT: The mass of the Earth is very small compared to the mass of the Sun. Hence the sum of the Sun's mass and the Earth's mass is for all practical purposes the same as the mass of the Sun alone.)

6. UNIVERSE, Chapter 5, Question 14, page 116.

7. UNIVERSE, Chapter 5, Question 28, page 116.

8. A photon has an energy of 0.015 eV.
(a) Calculate the wavelength of this photon. (Solution: 8.27 x 10-5 m)
(b) In what part of the electromagnetic spectrum does this wavelength lie?

9. UNIVERSE, Chapter 5, Question 36, page 117.

10. UNIVERSE, Chapter 5, Question 38, page 117.

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Last updated 2006 January 19


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