Physics⏱ 4 min read

Einstein's Energy Formula

E = mc²

📖 What is the Einstein's Energy Formula?

Einstein's mass-energy equivalence states that mass and energy are interchangeable. A tiny amount of mass contains an enormous amount of energy. This formula is the basis of nuclear energy and explains how the sun produces light.

🔤 Variables

E
Energy (Joules, J)The total energy contained in the mass
m
Mass (kg)The mass of the object
Speed of light squaredc = 299,792,458 m/s — so c² is enormous!

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🎯 Quick Fact

1 kg of mass converted to energy = 89.9 petajoules — enough to power a city for years!