Fahrenheit (°F)

Definition

Fahrenheit (°F) is a temperature scale used primarily in the United States and a few Caribbean countries. It is not an SI unit but is widely recognized. The scale sets the freezing point of water at 32°F and the boiling point at * *212°F** under standard atmospheric conditions.

History

The Fahrenheit scale was developed by Daniel Gabriel Fahrenheit in the early 18th century. In 1714, he introduced the first mercury thermometer and established the scale based on three reference points: the freezing point of brine, the freezing point of water, and human body temperature. By 1742, he standardized the scale we recognize today.

Uses

Fahrenheit is commonly used in everyday life in the U.S. for weather forecasts, cooking, and heating systems. It remains less common in scientific contexts, where Celsius or Kelvin are preferred.

Conversions

  • To convert Fahrenheit to Celsius: (°F - 32) × 5/9 = °C
  • To convert Celsius to Fahrenheit: (°C × 9/5) + 32 = °F
  • Absolute zero: -459.67°F = 0 K.

Fun Facts

  • A common misconception is that 0°F is the freezing point of water; it is actually 32°F.
  • The Fahrenheit scale was widely used before the adoption of the metric system, particularly in the U.S. and some Caribbean nations.
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