C = √ (E/m) We can determine c

[ebodet18]

If this is true why can't we just find an energy divided by a very small mass, square root it and that's what the speed of light equals for that object?

 

[Jorriss]

We can not because $c^{2}$ is the proportionality constant between mass and energy. One can not just find mass and energy in any ratio.

 

[Chestermiller]

No problem. Just tell us how you would go about accurately measuring the amount of energy in the mass.

 

[PAllen]

Let's have fun with this. Weigh a small mass in a known gravitational field; you've got m. Inject slowly (vanishing KE) into an anti-calorimeter; you've got 2E.

You can buy anti-calorimeters from the same store that sells 1 light year Born rigid rods, frictionless surfaces, rigid massless shells, etc.