Mass–Energy Equivalence (E = mc²)
E = m·c²
What it means
Einstein's famous equation states that mass and energy are interchangeable, with the speed of light squared as the conversion factor.
Variables
| Symbol | Quantity | SI unit |
|---|---|---|
E | energy | J |
m | mass | kg |
c | speed of light | m/s |
Worked example
Given m = 1 kg, c = 2.9980e+8 m/s, solve for E:
E = 8.9880e+16 J