Scribe

Hey it's Anh for the physics scribe today...so what did we do today?
Well we started off the class with a 20 minute video, which was of course being disruptive by Jennie..haha just kidding. The video was about Johannes Kepler's life and his discoveries. It was sort of like an autobiography.
During the movie we were required to fill out a sheet with 21 questions which are listed below with the answers:

KEPLER'S THREE LAWS VIDEOTAPE
1. What planetary model did Johannes Kepler believe in?
The Copernican model
2. Which planet's orbit did Kepler analyze?
Mars
3. How far off from a circle was the orbit of Mars?
8 minutes of arc or 1/4 of apparent width of the moon.
4. What type of curve can explain the orbit of Mars?
An ellipse
5. In an ellipse, is the total distance from 1 pin to the string and then to the other pin, a constant?
Yes
6. The name given to a single point in an ellipse is the ______.
Focus
7. Focus is the Latin word for ______.
Fireplace
8. How would you describe Kepler's childhood?
Poverty and illness
9. What journey did Kepler undertake in 1600 and for what purpose?
Tycho Brahe
10. What was the main interest of Tycho Brahe?
Astronomy
11. How did Kepler obtain the careful observations that Brahe made during his lifetime?
He stole them
12. Was the Copernican model of the universe easy to justify scientifically?
No
13. What were some of the problems that faced Kepler in discovering the secrets of the sky?
Movement, earth spins on an axis while revolving around the sun.
14. How many pages of calculations did Kepler have?
Over 900 pages
15. What does "in opposition" mean according to the positions of Mars, Earth, and sun?
Mars is seen at the same position, if seen from earth or sun.
16. Can any circle viewed obliquely be termed an ellipse?
Yes
17. In ancient history, which group of people studied conic sections?
The Greek
18. Is a parabola a popular shape in our world today?
Yes
19. In your own words, describe the term eccentricity?
How flat an ellipse is
20. State Kepler's 3 laws.
I Each planet moves as an ellipse with the sun at one focus.
II A line from the sun to each planet sweeps out equal area in equal time.
III T² is proportional to R³
21. How did Kepler earn money in later life?
Made astronomical charts

So after we went over the video sheet answers we did a lab applying Kepler's ideas which is in the textbook, page 158.

And that is where the class and this scribe post ends. Next scribe is Nivram?

bye bye bye bye bye bye bye bye bye bye bye bye