Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
m=1.52e21,r=1/2*1212.0e3,ω=0,V=0.2228e3+4.7e3,m*r
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random