What is E = MC2 ?

Question

Please give me details
THANK YOU

Answer 1

E = MC2 is Einstein's equation for the conversion of matter to energy (or reverse). One law of physics says that energy and matter can neither be created not destroyed (by ordinary means!). However nuclear reactions can create energy from matter or matter from energy. When we say that two toy blocks are glued together they are fused and if a large block is split into two (not necessarily equal) parts it is fissioned. In either case, scientists consider that the parts included "glue" and that is what changes per Einstein's equation. An easy way to think of it is that each toy block is held together with glue (perhaps sawdust and glue?) but when you fuse two blocks there is excess glue which is converted to energy. The glue is also known more formally as a "mass discrepancy" because the sum of the weight of the parts differs from the weight of the whole. Because the tiny mass of the glue is multiplied by the huge speed of light, C, squared a little glue becomes at lot of energy. In like manner, when a large block is fissioned the resulting two parts require less glue which is converted to energy. Very light atoms can be fused (hydrogen to make helium) and very heavy atoms (uranium) can be fissioned.

When you burn a lump of coal, tthe energy produced results from a difference in the energy of the electrons surrounding atoms and the resulting molecule. Exothermic reactions give up energy and endothermic reactions take up energy. However, in nuclear reactions, energy result from the change of glue in the nucleus of the parts joined or separated. A lump of uranium can give up far more energy than a lump of coal; even though very little mass is lost in the nuclear process. Hope that helps a little.

Answer 2

It is a theory which Einstein proposed to explain the relationship between matter and energy. The principle states that the amount of energy which can be obatined from a mass is equal to that mass times the speed of light (in a vacuum) squared. Einstein proposed this formula as a difference in mass originally as:

Delta E = Delta M * C^2

Answer 3

E=MC^2
Energy = Mass x Speed of light x Speed of light

The speed of light is a pretty big number and so you can see from the equation that if you could convert matter into energy, an awful lot of energy comes out!

This effect is seen in nuclear fission - when a atom of Uranium-235 decays it is converted into an atom of Thorium and a Helium nucleus. But, the mass of the products is slightly less than the mass of the original uranium - the difference is mass that has been converted into energy as in the above formula.

Answer 4

It is part of the physics trilogy: E = mc2, m = E/c2, and c2 = E/m. There is a writing "Time, Energy, and Gravity" found at http://360.yahoo.com/noddarc that will give further answer to your question. It is but a few pages long and easy to understand.

Answer 5

An equation by physicist Albert Einstein, in which
E = units of energy,
m = units of mass,
c2 (squared) is the speed of light squared, or multiplied by itself

Answer 6

energy equals mass times the speed of light squared. it shows the amount of energy given out during nuclear reacitons when the mass seems to shrink. its been a long time since secondary school so it might be wrong (a whole month!!!!!!!!!!!)

Answer 7

a formula attributed to albert einstein meaning that energy and matter are interrelated. The max energy you can get from matter will be limited by this formula.

Answer 8

The first part of the theory of relativity, it's the pop version, nobody seems to recall the reest

Answer 9

E=Energy
M=Mass
C=Speed of light
*=multiply
so it means
Energy=Mass * Speed of light squared

Answer 10

it is called einsteins equation.it relates energy n speed .