What units is E=MC measured in?

[scupydog]

Hi all could anyone tell me what units are used in the equation E=MC.

Thx, Dave.

 

[mgb_phys]

J, kg, m/s

 

[malawi_glenn]

but the equation is wrong.. E = mc^2 it should be ;-)

 

[Dale]

Hi all could anyone tell me what units are used in the equation E=MC

E is in units of energy, m in units of mass, and c in units of speed. mgb_phys already gave the standard SI units, but you can use any units that you prefer. For particle physics they often use eV (electron volts) for E and eV/c² for m and, uhh, c for c.

 

[mgb_phys]

but you can use any units that you prefer.

As long as the energy is in the natural units for the speed and mass - otherwise you need another proportionality constant.

That does mean the the "firkin furlong² fortnight^-2" is a natural unit of energy.

 

[scupydog]

J, m, m/s

what does the m for stand for ?

but the equation is wrong.. E = mc^2 it should be ;-)

sry that's what i should have typed.

 

[mgb_phys]

what does the m for stand for ?
sry that's what i should have typed.

Sorry I meant to type kg for mass
As DaleSpam said you can use any units you want for mass and speed but then the units of energy come out as the natural units for that measuerement system.
With SI (metric) it's easier, you could use lbs for the mass, mph for the speed of light and BTU for the energy but you would need another constant in front of the m to get the value right - it just happens that for kg / m / s the constant is 1.