kilojoule etymology

Etymology:

• Kilo- (prefix): Greek "khίλιοι" (khίlioi), meaning "one thousand"
• Joule (unit): Named after the English physicist James Prescott Joule (1818-1889)

Meaning:

A kilojoule (kJ) is a unit of energy equal to 1,000 joules.

Origin:

The kilojoule was introduced in the late 19th century as a convenient unit for measuring large amounts of energy. It is widely used in the fields of physics, engineering, and chemistry.

In 1960, the International System of Units (SI) adopted the joule as its official unit of energy. The kilojoule is thus a derived unit in the SI system.

Usage:

Kilojoules are commonly used to measure:

• Energy content of food and drinks
• Electrical energy consumption
• Heating and cooling system efficiency
• Work performed in machinery and devices

Conversion:

• 1 kilojoule (kJ) = 1,000 joules (J)
• 1 kilojoule (kJ) ≈ 0.239 calories (cal) or 0.948 British thermal units (BTU)

kilojoule relate terms

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