waht mean e=mc2 ?

Answer 1

This is probably the most-recognized equation in physics, even though many people don't really understand what it means.

It basically means two things:

1. Mass is just another form of energy (as are heat, kinetic energy, and light, among others), and it is possible to convert mass into these other forms of energy.

2. How much energy can a mass be converted into? To answer that, take the mass of an object and multiply by the speed-of-light-squared, and that's the answer. In other words,
E = m x c^2

In SI units, a 1 kg mass contains, potentially, 1 kg x (2.998 x 10^8 m/s)^2, or about 9 x 10^16 Joules of energy. That's 90,000,000,000,000,000 Joules, an incredibly large amount of energy from a modest amount (couple of pounds) of mass.

Hope this helps!

Answer 2

let me point out an article for you to read. e=mc2: 103 years later, Einstein's proven right Thu Nov 20, 6:56 pm ET PARIS (AFP) – It's taken more than a century, but Einstein's celebrated formula e=mc2 has finally been corroborated, thanks to a heroic computational effort by French, German and Hungarian physicists. A brainpower consortium led by Laurent Lellouch of France's Centre for Theoretical Physics, using some of the world's mightiest supercomputers, have set down the calculations for estimating the mass of protons and neutrons, the particles at the nucleus of atoms. According to the conventional model of particle physics, protons and neutrons comprise smaller particles known as quarks, which in turn are bound by gluons. The odd thing is this: the mass of gluons is zero and the mass of quarks is only five percent. Where, therefore, is the missing 95 percent? The answer, according to the study published in the US journal Science on Thursday, comes from the energy from the movements and interactions of quarks and gluons. In other words, energy and mass are equivalent, as Einstein proposed in his Special Theory of Relativity in 1905. The e=mc2 formula shows that mass can be converted into energy, and energy can be converted into mass. By showing how much energy would be released if a certain amount of mass were to be converted into energy, the equation has been used many times, most famously as the inspirational basis for building atomic weapons. But resolving e=mc2 at the scale of sub-atomic particles -- in equations called quantum chromodynamics -- has been fiendishly difficult. "Until now, this has been a hypothesis," France's National Centre for Scientific Research (CNRS) said proudly in a press release. "It has now been corroborated for the first time." For those keen to know more: the computations involve "envisioning space and time as part of a four-dimensional crystal lattice, with discrete points spaced along columns and rows."

Answer 3

It is the equation that proves that mass and energy are basically manifestations of the same thing. The idea that anything is actually "solid" is just an illusion we experience because of the scale we happen to exist in.

Answer 4

It actually is e=mc^2 . It is only one of Einstein's theories, (not fully proven) that in its simplest form means mass is a form of energy. Though its implications are vast, one of the most important applications was to determine whether light comprised of waves or fast moving particles.

It implies: Any mass accelerated to the speed of light will become pure energy. Such as photons accelerated to become a stream of light.

It also implies the speed of light is the fastest attainable speed of any mass because then it will become pure energy (light).
In the broadest sense if any object is accelerated to the speed of light it will become a wave of pure energy, which will have a value of its mass (kg) * the speed of light (300,000, 000 meters per second) squared.

Answer 5

Energy is equal to the mass of the objest times the speed of light squared

Answer 6

Energy equals the mass times the square of the speed of light.

This equations proves that matter and energy are interchangeable.

Answer 7

It basically tells you how much energy is released when something loses mass. It's useful in nuclear reactions to tell you how much energy (as heat) has been released after losing x amount of uranium.

Energy released= mass lost x velocity of light squared

Answer 8

energy is equal to mass times light times 2

Answer 9

Energy = mass times composition

Answer 10

if u are doing something that has to do with nuclear reactions or so..
and ur mass is reduced..
so, that just mean that ur mass was convereted to energy..

and in case you want to know what energy was released then
you can use this formula..