Physics
Advanced
Mass–Energy Equivalence
Energy equivalent of mass.
Formula
Variables
mMass
cSpeed of light (3×10⁸ m/s)
Example
1 gram of mass holds E = 0.001·(3×10⁸)² = 9×10¹³ J — about 21 kilotons of TNT.
Did You Know?
E = mc² means a single gram of matter holds the energy of roughly 21,000 tons of TNT.