This quantity is raised to the third power in the definition of Planck length.
This quantity is raised to the third power in the definition of Planck length. In the Einstein field equations, the product of 8 pi and the gravitational constant is divided by this quantity to the fourth power. An early calculation of it was made by Ole Romer using the eclipses of Jupiter's moons. This quantity is found in the Lorentz factor and is divided by velocity when calculating the index of refraction. In an equation developed by Einstein, energy equals mass times this quantity squared. For 10 points, name this value that is approximately three hundred million meters per second.
This quantity is raised to the third power in the definition of Planck length.
speed of light [prompt on "c"] 