C = √ (E/m) We can determine c

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Discussion Overview

The discussion revolves around the equation C = √(E/m) and its implications for determining the speed of light (c) based on energy and mass. Participants explore theoretical and practical aspects of measuring energy and mass in this context.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions why energy divided by a small mass cannot yield the speed of light for that object.
  • Another participant asserts that c² is a proportionality constant between mass and energy, suggesting that mass and energy cannot be taken in arbitrary ratios.
  • A different participant requests clarification on how to accurately measure the energy associated with a given mass.
  • Another participant proposes a method involving weighing a mass in a gravitational field and using an anti-calorimeter to measure energy, while also introducing a humorous tone regarding the availability of such devices.

Areas of Agreement / Disagreement

Participants do not reach a consensus; there are competing views on the feasibility and methodology of measuring energy and mass in relation to the speed of light.

Contextual Notes

Limitations include the assumptions about the measurement techniques and the definitions of energy and mass in this context, which remain unresolved.

ebodet18
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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?
 
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We can not because [itex]c^{2}[/itex] is the proportionality constant between mass and energy. One can not just find mass and energy in any ratio.
 
Last edited:
No problem. Just tell us how you would go about accurately measuring the amount of energy in the mass.
 
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.
 

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