Doing Math for Spheres

Helpful Formulas and Definitions

r = radius

Surface area of a sphere = 4 * pi * r^2

Volume of a sphere = 4 pi r^3

                     3

Circumference = 2 pi r

pi = 3.14159

from mark

G = gravitational constant == 6.672*10 E-11

Mass of earth +5.98 * 10E24

Time that it takes for a satellite to orbit the earth (in seconds -- IT MUST BE A SMALL SATELLITE)=

2pi                                                          * THE SQUARE ROOT OF R(in meters) CUBED

square root of the gravitational constant * the mass of the earth in KG