E = mc²

Firstly:

E = energy

m = mass

c[1] = the speed of light (186,000mps or 300,000km/s)

 What this formula states is:

Energy = Mass ∗ The speed of light ∗ The speed of light.

Or E = m (186,000 mps²)

Or E = m (34596000000)

Or E = m (3.4596 * 1010)

Simple logic will tell you that E = mc² is the same as:  A = bc²

                   ∴  If C = 3 (c²=3², or C = 9).

                   Then A = B (9)

 

According to the theory of relativity, mass and energy as commonly understood are two names for the same thing (one is not changed to the other).  If Energy & Mass are correlated then they are also co-dependant.  Whatever change happens to one also happens co-‘relative’ to the other. 

Thus to say Energy = Mass is correct[2].

If Energy = Mass, then the more energy something has the more mass it has, and indubitably the more mass something has the more energy it has. 

 



[1] C (The speed of light) is a constant, so the other numbers will change only variably with each other, while C has no changing effect on their value.

[2] It is now understood that although this formula is correct, it is also misleading in the subject of massless objects, where momentum becomes important as in the formula E=pc (p=momentum).   This being true does not take away any validity of the truth that E=mc² (or that E&M are co-relative).