Explain three scales of temperature kelvin ,celsiusand fahrenheit?
Answers
Celsius scale or degree centigrade
In nearly all countries of the world,the Celsius scale or degree centigrade is used for all popular and commercial and most scientific measurements. Anders Celsius (1701-1744) was a Swedish astronomer who,in addition to developing the temperature scale named for him,made measurements of the length of the arc of a median that verified Newton’s theory of the flattering of the earth at the poles.On Celsius scale,the interval between lower and upper fixed points is divided into 100 equal parts.The lower fixed point is marked as O °C and the upper fixed point is marked as 100 °C.It means on Celsius scale the freezing point of water is O °C and boiling point of water is 100 °C.
The Fahrenheit scale
The Fahrenheit scale ,used in the United States,employs a smaller degree than the Celsius scale,and its zero is set to a different temperature.Daniel Fahrenheit (1686-1744) ,a contemporary of Celsius ,was a German physicist who invented both the alcohol and mercury liquid thermometers and used them to study the boiling and freezing points of liquids.On this scale freezing point of water is 32 degree and boiling point of water is 212 degree. Fahrenheit scale is divided into 180 equal parts.
Kelvin scale
in SI units,the unit of temperature is kelvin(k) and its scale is called kelvin scale of temperature .the interval between the lower and upper fixed points is divided into 100 equal parts.Thus,a change in 1°c is equal to charge of 1 K. The lower fixed point on this scale corresponds to 273 Kn and the upper fixed point is referred o 373 K. The zero on this scale is called the absolute zero and is equal to _273°C. At the absolute 0 all thermometric properties are zero. There would be no kinetic energy.