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| abstraction > mathematical concept > number > quantity > energy > Planck energy |
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| Planck energy comparison table | ||
| Subject | is a kind of | has definition |
|---|---|---|
| energy | quantity | |
| Planck energy | energy | About 1000 kilowatt hours. The energy necessary to probe to distances as small as the Planck length. The typical energy of a vibrating string in string theory. |
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