You may have heard talk about the Ampere being redefined. Rest assured that unless you work at the highest levels of metrology, the change in how the Ampere is realized won't affect you. The present ...

A current flow for one hour measured in amperes (amps). Abbreviated "Ah" and commonly called "amp-hour," it is widely used to rate how long it takes for a battery to discharge. For smaller batteries, ...

The universe of physics is experiencing great changes: by 2018, scientists want to place all physical base units on solid, unchangeable foundation in the form of fundamental constants. The units ...