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.
(1/Sqrt(1 - 50^2/(299792458)^2) - 1)*10*(299792458)^2
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random