physics
posted by cb .
i keep trying to put this in my calculator but i keep getting the wrong answer...can someone please try it on their calculator and help me?
thnks
(a) Find the distance r to geosynchronous orbit.
Apply Kepler's third law. T^2=((4pi^2)/(GM_E))r^3
Substitute the period in seconds, T = 86,400 s, the gravity constant G = 6.67 multiplied by 1011 kg1 m3/s2, and the mass of the Earth, ME = 5.98 multiplied by 1024 kg. Solve for r.
T^2=((4pi^2)/(GM_E))r^3

What equation are you using? You should be using Kepler's third law, and setting the satellite period to 23 hours 56 minutes (1 sidereal day)
Or check the derivation here:
http://en.wikipedia.org/wiki/Geostationary
Respond to this Question
Similar Questions

PHYSICS
Could u help with physics hw! i keep trying but i keep getting the wrong answer? 
PLEASE HELP ME! PLEASE!
1 )3x + 8y = 1 7x + 4y = 17 Answer: (3,1) 2) 3x + 5y = 7 9x + 2y = 38 Answer: (4,1) 3) 7r + 3s = 13 14r  15s = 16 Answer: (1,2) 4) 2x  7y = 42 4x  14y = 64 Answer: No Solution ? 
physics
i tried doing this on my calculator but i keep getting the wrong answer..can someone try it on theirs and tell me what they got? 
Math
how do you solve this I keep trying and I keep getting the wrong answer. I keep getting x=19000 and that is not correct .10=.9(x/15000)+.14[(1x)/15000] 
Calculus
(This problem uses a TI89 calculator) Find the largest and smallest values of the following function on their given intervals: y=(cos x)^x [1.5, 4.75] This is what I put in the calculator (home screen): fMin((cos(x))^x,x I 1.5 < … 
Calculus (repost)
This problem uses a TI89 calculator) Find the largest and smallest values of the following function on their given intervals: y=(cos x)^x [1.5, 4.75] This is what I put in the calculator (home screen): fMin((cos(x))^x,x I 1.5 < … 
algebra I
for my homework I have to graph 4 equations: 1. y=1/4x^2+3x3 2. y=x^2+7x2 3. y<x^2+7x+6 4. y<*1/3x^2+4x+5/2 [<* means greater than OR equal to. I just don't know how to put the line under it] we are allowed to do them … 
Calculator Help
Is there a difference between TI89 Titanium calculator and TI83 calculator? 
Chemistry/Calculus
I have a question about how to plug in numbers on my calculator (TI30XIIS) to get an answer. How would I put in my calculator... ln 1.00X 102 mol/L /1.65 X 102 mol/L to get0.501? 
Mathematics concepts
Matthew sits at his desk unable to figure out the answer to a division problem. He reaches into his desk and pulls out a calculator. What is the correct response for Matthew's teacher to have?