The force between electrical charges is kind of a big deal—without it, the universe would be a primordial soup and you would not exist. That force is determined by the electric constant.
Related Posts
You Can Approximate Pi by Dropping Needles on the Floor
Who needs a supercomputer when you can calculate pi with a box of sewing needles?
AC or DC: Which Is Better?
Your gadgets run on direct current, but the electricity in your home is alternating current. What’s up with that?
Einstein Showed That Time Is Relative. But … Why Is It?
The mind-bending concept of time dilation results from a seemingly harmless assumption—that the speed of light is the same for all observers.