Albert Einstein

Scientists

Astrophysics

# Why is mass multiplied by the speed of light squared in Einstein's equation?

###### Wiki User

###### June 27, 2017 7:00PM

The easiest way to explain this is to look at this equation: 2+x=4. The only way to make the equation correct is to express it in such as way that it is balanced.

Top Answer

###### Wiki User

###### June 26, 2017 10:37PM

The speed of light, c is constant in all reference frames and is roughly equal to 3.00x108 meters per second. In the context of Einstein's relativity, the c2 functions more as a unit conversion factor than a constant. As such, it is squared as a result of dimensional analysis - energy is measured in joules, or kg m2 s-2, so adding the c2 ensures that the relationship between energy and mass is dimensionally consistent. ~ WikiHow.

## Related Questions

###### Asked in Astronomy

### How did everything come from nothing?

I, myself, am not sure, but one common theory is the big bang.
so if you take Einsteins equation of E=MC squared, then you'd be
able to backtrack by taking all the matter in the universe, and
multiplying it by the speed of light squared, and thats how much
energy there was. you can also flip the equation around, which is
how everything was created from nothing.

###### Asked in Chemistry

### How do you figure wavelength of an electron?

Use the de Broglie equation. Max Planck said that the energy was
a constant (which we now call Planck's constant, for obvious
reasons) multiplied by the wavelength. Albert Einstein said that
energy was mass multiplied by the speed of light in a vacuum
squared. Louis de Broglie said energy was energy, and therefore the
wavelength of a mass is the mass multiplied by the speed of light
in a vacuum squared, divided by Planck's constant.

###### Asked in Math and Arithmetic, Physics

### What does E-mc2 help to explain?

An equation derived by the twentieth-century physicist Albert
Einstein, in which E represents units of energy, m represents units
of mass, and c2 is the speed of light squared, or multiplied by
itself. (See relativity.)
# Because the speed of light is a very large number and is
multiplied by itself, this equation points out how a small amount
of matter can release a huge amount of energy, as in a nuclear
reaction.
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