##
Astronomy 161: Review Guide for Second Quiz

### Mechanics

Same as for the first quiz.
The quiz will have 10 multiple choice questions, and it will occupy the
first 20 minutes of Friday's class. If you're late, that's your problem ...
in accordance with the makeup policy,
you can only take a makeup quiz if you have notified me in advance that
you will be absent. The quiz is closed book, but you may bring a
single sheet (both sides) of *handwritten* notes. You may
bring a calculator, but you will not need it.
Please bring a number 2 pencil.

### Topics

The quiz will cover the material in Lectures 5-9 (i.e., through
Wednesday's lecture).
The reading for all of these lectures is chapter 4 of the textbook.

Names to know: Ptolemy (2nd Century AD),
Copernicus (1473-1543), Tycho (1546-1601), Kepler (1571-1630),
Galileo (1564-1642), Newton (1642-1727)

I don't expect you to know dates, but you should know the general order
in which things happened, which is evident from the birth and death dates
above: Copernicus developed his model first, Tycho carried out his
observations later in the same century, Kepler and Galileo were contemporaries
with Kepler building on Tycho's observations, and Newton worked after
Kepler and Galileo had made and published their discoveries.

While there will not be any complicated calculations on the quiz or the
midterm, we have by now covered several important equations. I expect
you to understand the physical content of these equations and the ways
that they can be applied, and to be able to do simple calculations with
them (e.g., if I double the distance between two objects, what happens
to the gravitational force between them?). The important equations
through lecture 9 are:

- a = d x (theta / 57.3 degrees)
- P
^{2} = a^{3}
- F = m a
- F = G M
_{1} M_{2} / d^{2}
- (r / 1 AU)
^{3} = (P / 1 year)^{2} x (M / M_{sun})

### Review Advice

As before, my
recommendation is to make sure that you are up to date with the reading
and to spend a couple of hours
going over the lecture notes, concentrating on any of the topics you found
confusing. Think particularly about how to answer the "Key Questions"
mentioned at the start of each lecture --- if you can run confidently
through the answers to these questions in your head, then you will be
in excellent shape for the quiz.
You should also review the in-class questions from these lectures.

Go to the A161 home page

Go to David Weinberg's Home Page

Updated: 2005 April 18[dhw]