sqrt[([299792 km/s]/[2.99792x10^7 Mhz/s]/[([938 MeV])])*[1.673×10^-26 newton second]^-1]

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.