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).
A Unit is a measure of energy used in billing.   A Watt is a measure of power, which is how fast energy is  converted.    Energy equals power times time, so 1 watt â¦ for 1 second defines 1  Joule of energy.   A Unit is a kilowatt-hour of energy, so 1000 watts for 3600  seconds, 3.6 million Joules.   Another Answer   A 'unit' is derived from the expression, 'Board of Trade  Unit'. Unit is a measure of energy used in billing.   A Watt is a measure of power, which is how fast energy is  converted.    Energy equals power times time, so 1 watt â¦ for 1 second defines 1  Joule of energy.