ocr: How are mass and energy related? The best-known equation in the world is probably: E-mc2. Very few people, however, know what the equation means. Ity was first written down by Albert Einstein, the famous physicist. It says that the amount of energy that an object contains, E (inj joules), is equal to the object's mass, m (in kilograms), multiplied by the square of the speed oflight, C (in meters per second). The speed ofl light is extremely fast- 300 million meters per second so the amount of energy in even a small object is enormous. For example a ball with a mass of 10 grams (0.01kg) will co ...
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