Fahrenheit is a Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. General description The formal properties of temperature are studied in thermodynamics. Formally, temperature is that property which governs the transfer of thermal... temperature scale named after the The Federal Republic of Germany ( German: Bundesrepublik Deutschland) is one of the worlds leading industrialised countries, located in the heart of Europe. Due to its central location, Germany has more neighbours than any other European country: these are Denmark in the north, Poland and the Czech Republic in the... German The word physicist should not be confused with physician, which means medical doctor. A physicist is a scientist trained in physics. Physicists are employed by universities as professors, lecturers, researchers, and by laboratories in industry. Employment as a professional physicist generally requires a doctoral degree. However, many people who have... physicist Daniel Gabriel Fahrenheit, also called Gabriel Daniel Fahrenheit (May 24, 1686 - September 16, 1736), was a physicist and an engineer, who most of his life worked in Netherlands and for whom the Fahrenheit scale of temperature is named. Fahrenheit was born in Gdansk in the Polish-Lithuanian Commonwealth province of... Gabriel Fahrenheit ( Events The League of Augsburg is founded. Russia, Saxony, Brandenburg and Bavaria join the Holy League against the Ottoman Turkish Empire. September 2 The forces of the Holy League of 1684 liberate Buda from the Ottoman Turkish rule that leads to the end of Turkish rule in Hungary during the... 1686РEvents January 26 - Stanislaus I of Poland abdicates his throne. February 12 - Francis I, Holy Roman Emperor weds Maria Theresa, mother of Marie Antoinette May 8 - Marriage of Frederick, Prince of Wales and Augusta of Saxe-Gotha. May 26 - Battle of Ackia: British and French troops. A French expedition led... 1736), who proposed it in Events January 14 - King Philip V of Spain abdicates the throne February 20 - The premiere of Italian opera by George Frideric Handel, takes place in London June 23 - Treaty of Constantinople signed. Partitioned Persia between the Ottoman Empire and Russia November 16 РChina expels foreign missionaries K̦nigsberg founded... 1724.

In this scale, the The melting point of a solid is the temperature at which it changes state from solid to liquid. When considered as the temperature of the reverse change, it is referred to as the freezing point. For example, the melting point of the element mercury is 234.32 kelvins (−38... freezing point of Drinking water This article focuses on water as we experience it every day. The water (molecule) article describes the water chemical and physical properties from a scientific and technical perspective. Water (from Low German or Old Saxon) is an abundant substance on Earth. It exists in many places and forms... water is To help compare different orders of magnitude this page lists temperatures between 100 kelvins and 1000 kelvins. Temperatures lower than 100 K Circumstances where man can stay for a while without special shelter shown with grey. Temperatures higher than 1000 K External link Conversion Calculator for Units of TEMPERATURE Categories... 32 degrees (this is written "32 °F"), and the boiling point is 212 degrees Fahrenheit, placing the boiling and melting points of water 180 degrees apart. Thus the The word unit means any of several things: One, the first natural number. The natural or usual or smallest measure of something, of which there are multiples and of which there may be fractions. In most physical contexts, for example science and engineering, unit is used to mean a physical... unit of this scale, a degree Fahrenheit, is 5/9ths of a The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. It is defined by two facts: zero kelvins is absolute zero (when molecular motion stops), and one kelvin is the fraction 1/273.16 of the thermodynamic temperature of the triple... kelvin (or of a degree The degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius (1701–1744), who first proposed it in 1742. The Celsius temperature scale was designed so that the freezing point of water is 0 degrees, and the boiling point is 100 degrees at standard... Celsius), and minus 40 degrees Fahrenheit is equal to minus 40 degrees Celsius.

History

There are several competing versions of the story of how Fahrenheit came to devise his temperature scale. One holds that Fahrenheit established the zero of his scale (0 °F) as the temperature at which an equal mixture of Icicles A natural ice block in Iceland Ice is the solid form of water. The phase transition occurs when liquid water is cooled below 0 Â°C (273.15 K, 32 Â°F) at standard atmospheric pressure. Ice can be formed at higher temperatures in pressurized environments, and water... ice and Sodium chloride, also known as common salt, table salt, or halite, is a chemical compound with formula NaCl. Sodium chloride is the salt most responsible for the salinity of the ocean and of the extracellular fluid of many multicellular organisms. It is commonly used as a flavour enhancer and preservative... salt melts (some say he took that fixed mixture of ice and salt that produced the lowest temperature); and ninety-six degrees as the temperature of blood (he initially used horse's blood to calibrate his scale). Initially, his scale had only contained 12 equal subdivisions, but then later he subdivided each division into 8 equal degrees ending up with 96. He then observed that plain water would freeze at 32 degrees and boil at 212 degrees.

Another well-known version of the story, as described in the popular physics television series The Mechanical Universe, holds that Fahrenheit simply adopted Ole Rømer. Ole Christensen Rømer ( September 25, 1644 – September 19, 1710) was a Danish astronomer who made the first quantitative measurements of the speed of light ( 1676). Rømer was born in Aarhus and died in Copenhagen. General biography the Rundetårn, or... Rømer's scale, at which water freezes at 7.5 degrees, and multiplied each value by 4 in order to eliminate the fractions and increase the granularity of the scale (giving 30 and 240 degrees). He then re-calibrated his scale between the freezing point of water and normal human body temperature (which he took to be 96 degrees); the freezing point of water was adjusted to 32 degrees so that 64 intervals would separate the two, allowing him to mark degree lines on his instruments by simply bisecting the interval six times (since 64 is 2 to the sixth power).

His measurements were not entirely accurate, though; by his original scale, the actual freezing and boiling points would have been noticeably different from 32 °F and 212 °F. Some time after his death, it was decided to recalibrate the scale with 32 °F and 212 °F as the exact freezing and boiling points of plain water. This resulted in the healthy human body temperature being 98.6 °F rather than 96 °F.

The Fahrenheit scale was widely used in many English-speaking countries until the The degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius (1701–1744), who first proposed it in 1742. The Celsius temperature scale was designed so that the freezing point of water is 0 degrees, and the boiling point is 100 degrees at standard... Celsius (formerly centigrade) scale was adopted in the late Centuries: 19th century - 20th century - 21st century Decades: 1900s 1910s 1920s 1930s 1940s 1950s - 1960s - 1970s 1980s 1990s 2000s 2010s Years: 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 Events and trends The 1960s was a turbulent decade of change around the world. Many of the trends of... 1960s and 1970s - Wikipedia /**/ @import /skins/monobook/IE50Fixes.css; @import /skins/monobook/IE55Fixes.css; @import /skins/monobook/IE60Fixes.css; /**/ 1970s From Wikipedia Millennia: 1st millennium - 2nd millennium - 3rd millennium Events and trends Although in the United States and in many other Western societies the 1970s are often seen as a period of... 1970s. In the The United States of America — also referred to as the United States, the U.S.A., the U.S., America¹, the States, or (archaically) Columbia — is a federal republic of 50 states located primarily in central North America (with the exception of two states: Alaska and Hawaii... United States and Jamaica is a country in the Caribbean Sea, located south of Cuba and to the west of Hispaniola, on which Haiti and the Dominican Republic are situated. National motto: Out of Many One People Official language English Capital and largest city Kingston Monarch Queen Elizabeth II Governor-General Sir Howard... Jamaica, the Fahrenheit system continues to be used by the general population for everyday, non-scientific temperature measurement; despite its murky origins, it remains well-suited for this use as temperature in temperate latitudes tends to range from around 0 °F to 100 °F. Conversion between the Fahrenheit and Celsius scales is given by the formula T_C = 5/9 · (T_F − 32), where T_C and T_F are the Celsius and Fahrenheit temperatures, respectively.

External links

• Alternate story at The Straight Dope (http://www.straightdope.com/classics/a891215.html)