c = the speed of light.
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The speed of light in vacuum.
E=MC2The E represents the units of energyThe M represents the units of massThe C Represents the Speed of LightE=MC2 means Energy equals mass times the speed of light squared. Although this is not 100% correct it is very close!
Speed of light.
E stands to Energy M stands for Mass C is the Speed of Light.It means the speed of light (in vacuum).
E=MC^2 the two means that the C at the end of the formula is squared, the 2 is an exponent (meaning that you times C by itself)