- An erg is the amount of work done by a force of one dyne exerted for a distance of one centimetre.
In the CGS base units, it is equal to one gram centimetre-squared per second-squared (g⋅cm2/s2).
It is thus equal to 10−7 joules or 100 nanojoules (nJ) in SI units.
- The rod is a surveyor's tool and unit of length of various historical definitions.
In British imperial and US customary units, it is defined as 16+1⁄2 feet,
equal to exactly 1⁄320 of a mile,
or 5+1⁄2 yards (a quarter of a surveyor's chain),
and is exactly 5.0292 meters.
