An erg is a unit of energy in the cgs system. It is equal to 10-7 joule (that is, 0.1 microjoule or 100 nanojoule) - a very small unit.
It doesn't "do" anything. An erg is an old unit for energy, in the cgs system. The modern unit for energy is the joule. 1 joule is 10 million ergs.
An erg is an old-fashioned unit for energy (from the cgs system). Energy cannot be created or destroyed, but you can convert one type of energy into another type.
Nobody "discovered" it. It's a natural unit in the cgs system, since it's the simplest energy unit expressed in the base units of that system. In SI, it's deprecated in favor of the joule; 1 erg = 100 nJ.
The cgs power unit is the erg, a dyne-centimeter.
wats ERG?
An erg is a unit of energy equivalent to 10-7 Joules. It is also a dyne centimeter, which is probably the most common expression of an erg. And 6.2415 ×1011 eV (electron volts) is also an erg. A link is provided to the Wikipedia article on the erg.
erg theory of motivation
The ERG guide number for nitrogen is 121.
1 erg = 1/10^7 Joules
If the emissions light turns on there is a problem with the exhaust system. The oxygen sensor, erg system and exhaust should be checked for any leaks or malfunctions.
An "erg" is used as the measure for energy and / or mechanical work and thus is often used in the context of physics. There exists conversions for erg in Joule since Joule is more common than erg.