The Planck length is equal to the square of the reduced Planck's constant times g divided by the cube of this quantity. Vacuum permittivity is given as one over permeability times this quantity squared, and this quantity also appears squared in the denominator of the Lorentz factor. Cherenkov radiation occurs when a particle exceeds this quantity and accounts for the blue glow of nuclear reactors. Time dilation occurs because this quantity is constant in all frames of reference. According to another equation, this quantity is equal to the square root of energy divided 
The Planck length is equal to the square of the reduced Planck's constant times g divided by the cube of this quantity. Vacuum permittivity is given as one over permeability times this quantity squared, and this quantity also appears squared in the denominator of the Lorentz factor. Cherenkov radiation occurs when a particle exceeds this quantity and accounts for the blue glow of nuclear reactors. Time dilation occurs because this quantity is constant in all frames of reference. According to another equation, this quantity is equal to the square root of energy divided by mass. For 10 points, name this quantity equal to about three times ten to the eighth meters per second.
The Planck length is equal to the square of the reduced Planck's constant times g divided by the cube of this quantity.
{speed of light} (accept reasonable equivalents, prompt on {“c”} before mentioned)