What is E=MC2? does anyone know the formula, and can explain what it means and how Einstein arrived at that?
83538
E=m*c*c is one of the most famous formulae that exist. It is actually not the full formula, which is \n\nE^2= (m^2)( c^4) + (p^2 )(c^2)\n\nbut for an object at rest, momentum p=0, so we get the familiar equation. Here c is the speed of light in a vacuum, which is the speed limit for our universe (nothing can go faster than the speed of light, according to the special theory of relativity). \n\nThe equation E=mc^2 describes the amount of energy that can be released when matter of mass m is converted to energy E, as in a nuclear power plant or nuclear weapon. \n\nIt arrived as a consequence of Einstein (and other physicists at that time) considering what would happen if you moved very fast, close to the speed of light. This lead to the special theory of relativity, which made all kinds of wild predictions:\n\n1. As you go faster, your mass increases\n2. As you go faster, you shrink, front to back\n3. As you go faster, time travels slower. \n\nThe details get pretty complicated, but I have attached a PBS web site where you can listen to some interviews with famous physicists about what they think about E=mc^2.
158826
The E=mc^2 equations come from Einstein's theory of Special Relativity. Special Relativity concerns the laws of motion and observed properties when objects are travelling very close to the speed of light.\n\nSpecial relativity starts with two premises: the speed of light is constant for all observers, and the laws of physics are the same for all observers. However, observed properties are not necessarily the same.\n\nSay I flew past the Earth in a space ship travelling 99% the speed of light. To me, the space ship is normal, but the Earth would look squished, rotated, and blue with everyone moving slowly. To you, however, Earth would look normal, but the space ship would be squished, rotated, blue and with everyone moving very slowly. (This gets resolved if the space ship turns around - breaking the symmetry - to come home, and results in the famous Twins "Paradox.")\n\nIn describing the laws of motion in the context of special relativity Einstein derived that E = mc^2 -- in other words that mass has a "rest energy."\n\nIf an electron and an anti-matter electron (known as the positron) bump into each other then their is total energy conversion. The mass of two electrons is converted into energy.\n\nIn a fission or fusion bomb the the atomic process (breaking apart a heavy atom, or fusing some light atoms) results in a  much smaller conversion of mass to energy. But still a lot compared with normal explosives.
679306
ITS [E=MC^2] - THE CONSERVATION OF MATTER AS ENERGY.. IT MEANS IF WE PUSH AN OBJECTS WITH A SPEED OF SQUARE OF SPEED OF LIGHT THEN THE ENERGY PRODUCED IN THE COVERAGE OF THE DISTANCE WITHOUT RETARDING OF 1 GM OF ANY MATTER OF DENSITY ABOVE 5GM/CM^3 WILL BE EQUAL TO THE ENERGY PRODUCED BY 10000KG OF U235 USED IN NUCLEAR REACTOR...
542466
Hey its very simple. It follows einstein's emergy mass relation viz. E=mc^2. Though photon is a massless particle but\nit has energy given by E=hv, v being the frequency. So the a part of photon's energy may be converted into mass and can give rise to massive charged particles like proton,electron etc. It can be understood from following equation:\n   E(photon) = m1*c^2 +m2*c^2 + 0.5*(m1*v1^2+m2*v2^2)\nIts notewrthy that the particles always appear in pair s.t. the two in a pair are of equal and opposite charges thus conserving the total charge.
40471
E=mc^2 \nEnergy = mass * (speed of light)^2, c = the speed of light (approx. 186,000 miles per second).
470586
E is normally expressed as joules (kilogram-meters per second^2)\n\nSo the mass is in Kg, and the speed of light is in Meters/Sec
1033843
e=mc^2\n\ne (energy)=m (mass) times c (the speed of light) squared
545787
E = mC^2. Therefore, Energy
866589
The formula expanded a bit is: E (joules or kg*m²/s²) = m (kilograms) multiplied by (299,792,458 m/s)2\n\nE is Energy, m is mass and c is the speed of light in a vacuum.  \n\nCheck out http://en.wikipedia.org/wiki/E%3Dmc%C2%B2\n\nOff the subject, but an important reply to Fresh Prince and those of the same mind:\n\nYou seem pretty mad.  It is unfortunate that "[we] people disgust [you]."  It does not diminish Einstein’s discovery to say God created the highly balanced universe which is made up of this mathematic formula as well as all formulas - discovered and undiscovered.  Einstein was doing wonderful work in unlocking the mysteries of Creation - he was a genius among geniuses\n\nEinstein himself believed in a "god / creator" - not the God of the Bible, but a Creator nonetheless.  He was not closed - he acknowledged that the universe is so finely balanced on finite mathematical principals, there is a higher intelligence governing things that we cannot comprehend.  He spent his life exploring the wonder of what has been created and set before mankind.  Please cast aside your disgust.  No one is taking credit away from Einstein - or you.  \n\nRegarding religion, Einstein said: "The most beautiful and deepest experience a man can have is the sense of the mysterious. It is the underlying principle of religion as well as all serious endeavor in art and science. He who never had this experience seems to me, if not dead, then at least blind. To sense that behind anything that can be experienced there is something that our mind cannot grasp and whose beauty and sublimity reaches us only indirectly and as a feeble reflection, this is religiousness. In this sense I am religious. To me it suffices to wonder at these secrets and to attempt humbly to grasp with my mind a mere image of the lofty structure of all that is there."\n\nWhen asked: "[Do] You accept the historical Jesus?" \n\nHe replied: "Unquestionably! No one can read the Gospels without feeling the actual presence of Jesus. His personality pulsates in every word. No myth is filled with such life."\n\nNo, Einstein did not believe in God as Christians believe.  But he recognized the order of the universe as a signpost to a higher being.  The point is, there is no cause to be "disgusted" by ideas outside your paradigm.  I am not disgusted with you.\n\nTake a hint from Einstein - the consummate scientist who believed in a Creator: "...science without religion is lame, religion without science is blind."  I will not be blind, so please do not be the former.  Take a look from another perspective; you may learn something of value.\n\nRemember, you may be angry with God, deny God, ignore God, and not care to inquire with an open mind, but God loves you anyway.\n\nHave a blessed day, my friend (that is a positive statement, please take it as such).
947891
E = mc2 states an equivalence between energy (E) and mass (m), in direct proportion to the square of the speed of light in a vacuum (c2). \n\nhttp://www.drphysics.com/syllabus/energy/energy.html\n\nEinstein reasoned that the center of mass of an isolated system doesn't just move on its own. So, the motion of the cylinder must be compensated by the motion of some other mass. Let's assume the light has mass m. Then, Mx=mL, since the cylinder moves x to the left and the light moves L to the right. Substituting the expression for x given above, the equation can be simplified to E=mc2.
853466
Equivalence.\n\nPhysics had long treated many things of being of entirely different natures.  Matter was concrete.  Absolute.  It followed laws of motion and the like.  Energy, on the other hand, was ethereal, zinging around and through the matter.  It is not ridiculous that physicists had thought this way - this is much of our experience of the physical world.\n\nE=mc^2, however, suggests that this is just not so.\n\nLiterally, it states that matter -IS- energy.  And conversely that energy is matter.  There is no 'special' status for one or the other.  Baseballs have a wavelength like any chunk of energy, and energy must occur in packets like any chunk of mass.  While quite simple in its statement, it is pretty staggering in its implication.\n\nFor example, it is used to explain how stars run (fusion turns minute amounts of mass into energy), explain the expansion of the universe (free energy turns into particle pairs which exert an outward pressure on space itself), and why photons which have no rest mass, can nonetheless push things around with impact (their speed and energy GIVE them mass).\n\nIf you want to use the equation itself, make sure your units match up.  If you use kilograms for mass and measure the speed of light in metres per second, energy will be in joules.  Hope that helps!
953904
No common denominator for the energy in the things you mention except that if it has mass, then it embodies the energy given in E = mc^2\n\nThis applies to ALL matter.
791590
E = m x c^2,\nso \n\nmass = Energy / c^2 (speed of light squared)
987522
The equation was a result of the mathematics involved in explaining the Special Theory of Relativity.  \n\nAfter the theory was published, a mother and son team of physicists (sorry but I forget their names), were performing fission experiments.  Fermi was the first to have performed a sustained chain reaction.  When this team split an atomic nucleus, they found that the parts left over after the split did not add up mass or matter-wise to the mass of the original atomic nucleus.  Where did this mass go?  It was converted into energy.  Energy and matter are transmutable.  At what rate does matter convert into energy in a fission  reaction?  c^2\nEnergy [E] is equal to mass [m] * the speed of light [c] squared.
652701
The theoretical physics equation E = mc2 states a relationship between energy (E), in whatever form, and mass (m). In this formula, c², the square of the speed of light in vacuum, is the conversion factor required to formally convert from units of mass to units of energy, i.e. the energy per unit mass. In unit specific terms, E (Joules) = M (kilograms) · (299792458 m/s) 2.\n\nMeaning of the Formula:\nThis formula, which was discovered by Albert Einstein, proposes that when a body has a mass (measured at rest), it has a certain (a very large) amount of energy associated with this mass. This is opposed to the Newtonian mechanics, in which a massive body at rest has no kinetic energy, and may or may not have other (relatively small) amounts of internal stored energy (such as chemical or thermal energy), in addition to any potential energy it may have from its position in a field of force. That is why a body's mass, in Einstein's theory, is often called the rest energy of the body. The E of the formula can be seen as the total energy of the body, which is proportional to the mass when the body is at rest.\n\nConversely, a single photon travelling in empty space cannot be considered to have an effective mass, m, according to the above equation. The reason is that such a photon cannot be measured in any way to be at "rest" and the formula above applies only to single particles when they are at rest. Photons are generally considered to be "massless," (i.e., they have no rest mass or invariant mass) even though they have varying amounts of energy.\n\nThis formula also gives the quantitative relation of the quantity of mass lost from a resting body or an initially resting system, when energy is removed from it, such as in a chemical or a nuclear reaction where heat and light are removed. Then this E could be seen as the energy released or removed, correponding with a certain amount of mass m which is lost, and which corresponds with the removed heat or light. In those cases, the energy released and removed is equal in quantity to the mass lost, times the speed of light squared. Similarly, when energy of any kind is added to a resting body, the increase in the resting mass of the body will be the energy added, divided by the speed of light squared.
895733
Energy=Mass * (speed of light)^2
1018446
I know Einstein came up with it and it deals with energy.\n\nEnergy(E) = Mass(m) * Speed of Light(c2)