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
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.
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?
Squeeze More Juice Out of Your Dead Batteries—Using Physics
How the joule thief circuit “steals” energy from seemingly depleted power cells.