- Energy and power
- Widely used in energy measurement
One Joule is 1 Newton Metre, ie the work done or energy transfered to an object when a one Newton force acts on it over one metre. It can also be defined as the heat energy dissipated by a current of one ampere passing through a one Ohm resistor for one second
The Joule is named after James Prescott Joule, an English physicist and brewer. Joule studied heat, and discovered the relationship between heat and mechanical work
- One joule is approximately the ammount of electrical energy needed to light a 1 watt LED for 1 s. A person at rest typically generates about 60 joules of heat per minute.
commonly used in design and engineering
- Often subdivided into milli and microjoules
- There are 1,000 joules in a Kilojoule , 1,000,000 in a Megajoule, etc.