The methods of standardization or calibration employed have much in common even in the cases that appear most diverse.
The joule (/ËdÊuËl/), symbol J, is a derived unit of energy in the International System of Units. It is equal to the energy transferred (or work done) to an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre (1 newton metre or NÂ·m).
Energy is the capacity to do work. The unit of energy most often used in this country is the Btu (British Thermal Unit). The unit measure of electricity is the kilowatt hour (kWh), which is about equivalent to 3,412 Btu's.