In the equation E = mc squared, what does a velocity, the speed of light, have to do with energy and mass equivalence? What unit of measure is the speed of light
![E=mc2 - "Einstein`s equation showing that Energy is equal to mass times the speed of light squared" by AcronymsAndSlang.com E=mc2 - "Einstein`s equation showing that Energy is equal to mass times the speed of light squared" by AcronymsAndSlang.com](http://acronymsandslang.com/acronym_image/21/2c563e74ce5cc3b2c1eab16de7d341a6.jpg)
E=mc2 - "Einstein`s equation showing that Energy is equal to mass times the speed of light squared" by AcronymsAndSlang.com
![At Speeds Near Light Mass Does not actually Change unless you apply more energy. A New look at E=mc2 – Totally Crunked At Speeds Near Light Mass Does not actually Change unless you apply more energy. A New look at E=mc2 – Totally Crunked](https://totallycrunked.files.wordpress.com/2017/08/55188a6d33fa7e9a7ba99e2873c7ce1a-albert-einstein-poster-science-humor.jpg)