Lecture #? (1/29) Flashcards
Why would Tycho not give Kepler his data?
Because Kepler had refused to use his model for the universe
When did Tycho die?
1601
What did Kepler demand about his data?
PRECISION of data (small errors not acceptable)
After tearing apart Tycho’s data, what did Kepler discover?
After 8 years, what finally made Kepler’s data work?
Abandoning perfect circles and using elliptical orbits
What is Kepler’s 1st law?
Elliptical orbits:
What is Kepler’s 2nd Law
What is Kepler’s 3rd law
[p^2=a^3] More distant planets orbit the sun at slower average speeds
(p= orbital period in years
a= average distance from the sun in AU)
What does p^2=a^3 mean?
Kepler’s 3rd law:
p=
a=
What mathmatical model does kepler use to plot planetal orbits
Logarithms; all form a straight line when lined up due to all being in orbit around the sun
Who’s system did Kepler’s Laws modify?
Copernicus
What model did Kepler’s laws permanently kill out?
Ptolemaic model (circles) now 100x more accurate
When was Newton born
Christmas 1642
What is the absolute most evil thing Newton created
Differential and integral calculus
What things did newton create/pioneer
- Calculus (ew)
- Law of gravity
- optical
- New world picture
- tides
- new type of telescope
- “Principa”
What is the name of Newtons publication?
“Mathematical Principles of Natural of Natural Philosophy” AKA “Principa”
When did Newton publish “Principa”
1687
What was the name of the telescope Newton made?
Newtonian reflector
What language was “principa” writen in?
Latin
What is Newton’s 1st Law
An object at rest stays at rest, an object in motion stays at motion unless
What is inertia
What is Newton’s second Law
Acceleration is equal to force/mass
What is Newton’s 3rd Law
Every action (force) has its equal opposite reaction
What is Newton’s Gravitational Force Law? (two parts)
a) Force is central for spherical objects
b) F magnitude (gravity exists, it is a force)
