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Planck units

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220px-Max Planck 1933

Max Planck

The Planck units are a system of units based on five fundamental constants, named after their inventor Max Planck:

  • The speed of light in a vacuum c, which is equal to exactly 299792458 meters per second
  • The gravitational constant G, approximately equal to \(6.67408 \times 10^{-11}\) meters cubed per kilogram per second squared
  • The reduced Planck constant ħ, approximately equal to \(1.05457 \times 10^{-34}\) joule-seconds
  • The Coulomb constant ke, approximately equal to \(8.98755 \times 10^9\) meters per farad
  • The Boltzmann constant kB, approximately equal to \(1.380649 \times 10^{-23}\) joules per kelvin

By relating these units using dimensional analysis, a system of units can be created. Some Planck units are very small (example: the Planck volume, equal to about \(4.222 \times 10^{-105}\) cubic meters), but some are very large (example: the Planck pressure, equal to about \(4.633 \times 10^{113}\) pascals). [1]

Large numbers in science



Sources Edit

  1. https://en.wikipedia.org/wiki/Planck_units

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