The term 'Joule Parts' can be broken down into two parts: Joule and ERGS (4 letters). Joule is a unit of energy, named after the English physicist James Prescott Joule. ERGS is a unit of work or energy, equal to the work done by a force of one dyne acting over a distance of one centimeter. Together, Joule Parts refer to the amount of energy or work required to move an object a certain distance.