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).
You can view more details on each measurement unit: therm [U.S.] or Btu. The SI derived unit for energy is the joule. 1 joule is equal to 9.48043427973E-9 therm [U.S.], or 0.000947817077749 Btu.