The text above is not a recommendation to uninstall Glance 2.9 by Glance Networks, Inc. from your PC, we are not saying that Glance 2.9 by Glance Networks, Inc. is not a good application for your PC.
The speed of light squared is a colossal number, illustrating just how much energy there is in even tiny amounts of matter. A common example of this is that 1 gram of water -- if its whole mass were converted into pure energy via E=mcÂ² -- contains as much energy as 20,000 tons (18,143 metric tons) of TNT exploding.ow we're getting to the cÂ² part of the equation, which serves the same purpose as the star-on and star-off machines in The Sneetches.. The c stands for the speed of light, a universal constant, so the whole equation breaks down to this: Energy is equal to matter multiplied by the speed of light squared.
The metre is the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second. This defines the speed of light in vacuum to be exactly 299,792,458 m/s. Unfortunately it doesn't mention anything about inertial frames, but you can consider a measurement in an inertial frame to be implied. However, this is not the end of the matter. The SI is based on very practical considerations.