Equations
Angular size
Law of gravitation
s
"
=
2! r 360!
Velocity
F12 = F21 =
Acceleration
!
! !v
a=
!t
!
! !x
v=
!t
Momentum
!
!
p = mv
Gm1m2
d2
Keplers 3rd Law
p2 = a3
p = orbital period in years
a = avg. distance from Sun in AU
Angular momentum
L = mv

Assignment Solutions
This is a compilation of solutions for some of the math
problems in the online assignments
Assignment 3: Finding a stars diameter
The supergiant star Betelgeuse (in the constellation Orion) has a measured angular
diameter of 0.044 arc

AS 105 Midterm Exam 1
Fall 2006
Name _
Solutions
Name_
ID_
INSTRUCTIONS: Choose the one alternative that best completes the statement or answers the
question. There are 25 questions and 1 bonus question. There is no penalty for wrong answers.
A list of eq