Example 1
1.0 g of mass corresponds to about 8.99 × 10¹³ J of rest energy.
Mendeleev
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Physics tools › Mass–energy equivalence
Mendeleev · Physics
Mass–energy equivalence
Mass corresponds to an enormous amount of rest energy because the speed of light is squared.
Formula usedE = mc²
Visual cue · spectrum / wave
Calculate
Mass–energy equivalence
What do the symbols mean?
Eenergy
mmass
Two worked examples
Example 2
1 kg corresponds to about 8.99 × 10¹⁶ J.
Good to knowThis is rest-energy equivalence. It does not mean ordinary processes convert an object’s entire mass into usable energy.