(_E=MC2_) 

Is an emoticon that means smartass. Often used in IRC.

Oh Gus, u r a fking (_E=MC2_)

(_E=MC2_) by Dat_ass May 31, 2012

E=mc2

E=mc2 is an incorrect format to write Einsteins equation for the theory of special relativity. The correct way to write the equation when the hypertext capability is not possible is to use ^2. Thus, the correct way to write the equation is E=mc^2. (ESMC)

Rest Energy=Rest Mass*Speed of Light (3.0*10^8m/s)^2

Derived by Einstein and is the fundamental equation that explains mass->energy conversion.

E=mc^2 not E=mc2

E=mc2 by STUVWX MC^234567 July 11, 2019

e=mc2

Albert Einstein's forumla for his theory of general relativity.

E is Energy
m is Mass
c2 is really c squared (c^2). This means the velocity of light (8.0 x 10^8 meters/second)

By using this, it shows that no mass can accelerate to the speed of light.

Einstein is k1xx0r1ng j00 f00l'$ $#177`/ |V|47# $|<177$

e=mc2 by Yuri December 21, 2003

E=MC² 

The only definition on Urban Dictionary with the actual ². It basically means Energy=Mass X Speed of light squared. Simple, eh?

Wow! Somebody knows how to do the ² in E=MC²!

E=MC² by glaires April 5, 2010

e=mc2

How idiots write E=MC^2.

The ^ signals "to the power of," which in the case of two we shorten to "squared."

e=mc2 by Al Einstein May 3, 2005

e=mc2

I'm E what up And I'm MC squared,
We came to rhyme and we came prepared
Yo I like this beat that you're given me,
Now tell me the theory of relativity
E stands for energy, sucker fool It’s not measured in watts bitch, it’s measured in joules
Listen up class, the M is for mass And if you don’t like it you can kiss my ass
The C stands for the speed of light in a vacuum so back up hoes and give me some room
An invariant mass requires rest energy without a hitch
We made Newton’s second law that appears in a nonrelativistic classical mechanics sitch, biotch

e=mc2......Einstein, motherfucker

e=mc2 by Oedipus T-Rex September 1, 2013

E=mc2

Albert Einstein's theory of realitivity meaning energy=mass x the speed of light squared

E=mc2 a simple equation but a lot of value.

E=mc2 by awesomeguy02 June 28, 2015