This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Energy = mass x the speed of light squared.
The equation tells us that energy and mass are the same thing, and how much energy is contained in a given mass, or vice versa. In other words, mass is really very tightly packed energy.
Einstien explained that"It followed from the Special Theory of Relativity that mass and energy are both but different manifestations of the same thing - a somewhat unfamiliar conception for the average mind. Furthermore, the equation E is equal to mc², in which energy is put equal to mass, multiplied with the [by the] square of the velocity of light, showed that very small amounts of mass may be converted into a very large amount of energy and vice versa. The mass and energy were in fact equivalent, according to the formula mentioned before [E = mc²]. "
Albert Einstein has established the correlation between mass and energy.

E- represents the energy, which we measure in Joules. 

m- represents the mass of the specified object in Kilograms.

c- represents the speed of light. In a vacuum  300,000,000 meters per second.