Water has a freezing point of 32 ☏ and a boiling temperature of 212 ☏ on the Fahrenheit scale. Water has a freezing point of 273.15 K and a boiling point of 373.15 K on the Kelvin scale. There are several techniques for converting temperatures. Temperature is measured using thermometers using well-defined scales. Above and below the fixed points, the scale may be extended by marking off degrees of the same size. It is divided into 100 equal spaces for Celsius scale Fahrenheit divided into 100 equal spaces for the Celsius scale, or 180 for the Fahrenheit scale, to give the individual degrees.
The interval between the fixed point marks in a thermometer is called the fundamental interval.On this scale, the lower fixed point is chosen as 32 ☏ and the upper fixed point is chosen as 212 ☏. It is called the Fahrenheit scale and was introduced by Gabriel Daniel Fahrenheit. There is another important scale of temperature.This scale is in common use in most countries. So it is also called the Celsius scale, in which the lower fixed point is chosen as 0 ☌ and the upper fixed point is chosen as 100 ☌. The Centigrade scale was first introduced by Anders Celsius.The lower fixed point is the temperature of pure melting ice under an external pressure of 76 cm of Hg at sea level and 45° latitude (under normal atmospheric pressure).The upper fixed point is the temperature of steam from water boiling under an external pressure of 76 cm of Hg at sea level and 45° latitude (under normal atmospheric pressure).In defining the common temperature scales, two conveniently reproducible temperatures, called fixed points, are used: This feature serves as the foundation for the ordinary alcohol thermometer as well as the early mercury thermometers. For most substances, for example, volume increases with temperature. This problem was, however, removed when common scales of temperature were devised in the first half of the eighteenth century.Ī thermometer can be based on any physical attribute that is consistently and reproducibly affected by temperature. At that time completely arbitrary scales were used so that readings of any two thermometers had wide disparity. The thermometer based on the expansion of a liquid the mercury-in-glass thermometer was invented in the seventeenth century. Class 11 NCERT Solutions - Chapter 3 Trigonometric Function - Exercise 3.1.Average and Instantaneous Rate of Change.Augmented Assignment Operators in Python.Class 11 NCERT Solutions - Chapter 7 Permutations And Combinations - Exercise 7.1.Importance of Chemistry in Everyday Life.Difference Between Mean, Median, and Mode with Examples.What is the Difference between Interactive and Script Mode in Python Programming?.ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.
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