# ASTR 100 (Hamilton) HOMEWORK ASSIGNMENTS

## Homework #1 (20 Points) Due Tuesday Feb. 9

Before starting this homework, please read chapters 1 and 2. Be sure to try the "Quick Quiz" at the end of each chapter (answers are on page A-13) - this is a great way to see if you are absorbing the material. It is also an excellent way to practice for the exams, which will include some multiple choice questions eerily similar to these ones. I recommend doing this for each of the chapters as you read them and again before exams.

Now you should be easily able to work the following questions and problems. Always put your name and section number at the top of your homework!

 Chapter 1 Page 17 Questions 19, 21, 22 Chapter 2 Page 35 Questions 13, 14, 17, 18, 19

Another Question. Go to the class web page and explore the link Astronomy Classroom located immediately below "Useful Links". Run the "Scientific Notation" program until you are sure that you can do the "Convert" problems in your sleep (or on a midterm, so don't use a calculator!). Now take the conversion quiz (you may retake it as many times as you'd like), make a printout of your results and hand it in with the rest of your homework.

Last Question. a) Look at the diagram on page 3. One of the numbers is wrong - find it. b) Does the Sun "outweigh all of the planets combined by more than a factor of 1000" as the authors state on page 6? Check by using the Astronomy Workshop's "Planetary Calculator" (under "Solar System Calculators"). Moral of this story - be a cautious reader!

Extra Credit (2 Points): Find the "Astronomical Distances" program in the same area of the Astronomy Workshop. How fast can you make the spaceship travel? How quickly can you get to the nearest star?

Extra Credit (2 Points): In the same area of the Astronomy Workshop, you'll find the "Astronomical Sizes" and "Universe Timeline" tools. How does Earth compare in size to a White Dwarf? With time compressed to one year, when will the Sun become a White Dwarf? When is the last ASTR100 Homework due?

## Homework #2 (20 Points) Due Tuesday Feb. 23

 Chapter 3 Page 53 Questions 14, 16, 20, 22 Chapter 4 Page 74 Questions 14, 16, 20, 21, 22, 23

Extra Credit (2 Points): Go to the Astronomy Classroom link from the main class web page (under "Useful Links"). Run the "Scientific Notation" program with the "Practice Multiply/Divide" until you are sure that you can do this type of problem in your sleep (or on a midterm!). Now take the Multiply/Divide quiz, make a printout and hand it in with the rest of your homework.

Extra Credit (2 Points): Now check out the "Working with Equations" program. What are all of the variables in the two equations that contain "GM"? Check those two boxes and try the program. If you have trouble doing either of these problems, be sure to talk to your TA about it. This and Scientific Notation are the ONLY type of math problems that I will ask you to do on a test.

## Homework #3 (20 Points) Due Tuesday Mar. 9

 Chapter 5 Page 93 Questions 14, 16, 20, 21, 22 Chapter 6 Page 111 Questions 13, 15, 17, 20, 21

Extra Credit (4 Points): Test Yourself! Do the Quick Quizzes for the five chapters that will be on the midterm and see how you do! This is an excellent way to start studying for a midterm! Write down which questions you got wrong and turn that in to claim your bonus points. Now go to the Supplementary Information link from the main class web page (under "Useful Links"). If the link is working, pick a few sections, look through the material, and try at least one quiz. Tell me which section(s) you looked at, and how many questions you got right and wrong. If you answered any questions wrong, be sure to read the corrected quiz carefully!

## Homework #4 (20 Points) Due Tuesday Mar. 30

 Chapter 7 Page 126 Questions 16, 20, 21, 22 Chapter 8 Page 142 Questions 13, 15, 17, 19, 20, 21

Extra Credit (4 Points): Follow one of the SOLAR SYSTEM links from the main class web page (under "Useful Links"). Explore some of the sublinks, and write a paragraph summarizing what you find, and a paragraph describing what you learned (Use your own words!)

## Homework #5 (20 Points) Due Tuesday Apr. 13

 Chapter 9 Page 160 Questions 13, 14, 15, 16 Chapter 10 Page 177 Questions 14, 15, 16, 17, 18, 20

Extra Credit (4 Points): Feeling stressed? Slam some asteroids and comets into the Earth and see what happens on the "Solar System Collisions" webpage (Follow the Explore the Possibilities link). Describe what happens -- and how often -- for asteroids of several different sizes (small, medium, large, HUGE!). Imagine a rocky asteroid moving at 20 km/s, how big does it have to be to create a magnitude 9.5 earthquake?