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.
4 G M/(3 c^3), G=6.67*10^-11,c=299792458, M=10*1.989*10^30
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
