Kilojoules
Abbreviation/Symbol:
- kJ
Unit of:
- Energy and power
Worldwide use:
- Widely used in energy measurement
Definition:
One Kilojoule is 1,000 Newton Metre, ie the work done or energy transfered to an object when a 1,000 Newton force acts on it over one metre. It can also be defined as the heat energy dissipated by a current of 1,000 amperes passing through a one Ohm resistor for one second
Origin:
The Joule is named after James Prescott Joule, an English physicist and brewer. Joule discovered the relationship between heat and mechanical work
Common references:
- The NHS in the United Kingdom advise a man needs to eat around 10,500kJ a day to maintain his weight and a woman needs around 8,400kJ. A 330ml can of regular Coke at the time of writing (November 2015) contains 581 kJ. Tea light candles produce roughly 550 kj
Usage context:
commonly used in design and engineering
Component units:
- Commonly subdivided into 1,000 joules
Multiples:
- There are 1,000 Kilojules in a Megajoule , 1,000,000 in a Gigajoule, etc.