Question
The planet Neptune has an orbital radiu around the sun of about 4.50 * 10^12m. What are its period and its orbital speed?
Answers
drwls
Use Kepler's third law. If R is in a.u. and the period T is in years,
T^2 = R^3
(for solar sytem planets only)
For the velocity , use
v = 2*pi*R/T
and express T in seconds and R in meters
T^2 = R^3
(for solar sytem planets only)
For the velocity , use
v = 2*pi*R/T
and express T in seconds and R in meters