It's a fundamental use and WolframAlpha appeared entirely uncooperative.


E = (4.49*10^16 Joules),
m = (1 kilogram),
c = (speed of light in vacuum),

and the equation:

v = (sqrt(E) c sqrt(2 c^2 m+E))/(c^2 m+E)  

Give me v for the values given. Just substitute the values and calculate the result.

But I'm getting all kind of weird results. Graphs. Roots of equation where m is the variable. Definition of vacuum. "true" (yes, W.A. confirms, c does equal speed of light in vacuum).

But to substitute all the values, get a simple number, the output in meters/second? That's apparently too much to ask for. What am I doing wrong?

  • @pnuts: How would you rewrite the equation to make it right for WA? – SF. Sep 24 '17 at 10:23
  • @pnuts: The one for v. Or did you mean a different one in your comment? – SF. Sep 25 '17 at 0:58

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