NEET UG » NEET UG Study Material » Physics » Celsius and Fahrenheit

Celsius and Fahrenheit

In this article we will discuss Celsius and Fahrenheit, Celsius to Fahrenheit logic, what is 0 degrees Celsius and more.

The Celsius scale, also known as the centigrade scale, is a temperature scale based on water’s freezing point of  0℃ and boiling point of 100℃. The Fahrenheit scale is based on the freezing point of water being 32℉ and the boiling point of water being 212℉.

Temperature

The physical attribute of an object or body is commonly referred to as temperature. It is stated as a notion for determining the degree of heat or cold on a body’s surface. Whenever the temperature of an object is measured, the different temperature measurements are used to express it. By defining the quantity, the usage of temperature units makes it broadly suitable.

The total kinetic energy of the particles in the object that are heated and motion is called as temperature. The more the kinetic energy of any particle or material, the more the temperature of that object or substance. Temperature can be measured using a variety of scales that use various units, namely the Celsius scale, Fahrenheit scale, or Kelvin scale. Even so, the ‘degree’ sign is used to indicate temperature on all three scales.

SI Unit of Temperature

Kelvin is the Standard unit for temperature. The unit of temperature called as kelvin is used for all standard units of the temperature of any material or body all around the world. The kelvin is represented by the sign ‘K.’ In the universal system of units, Kelvin is generally used as the basic unit for thermodynamic temperature measurement.

Types of temperature scale

There are mainly four types of temperature scale are

Fahrenheit Scale

In the United States as well as several areas of the Caribbean, the Fahrenheit measurement is the most widely used technique of temperature measurement. It was developed in the early 18th century by German scientist Daniel Gabriel Fahrenheit, who derived its measurement standards from an earlier scale developed by Ole Roemer.

The temperature of water is 32 degrees Fahrenheit whenever it freezes and 212 degrees Fahrenheit whenever it boils. Negative temperatures, under 0 degrees Fahrenheit, are shown on the Fahrenheit temperature scale. Absolutely zero, or -459.67 degrees Fahrenheit, is the lowest temperature achievable.

Celsius Scale

Beyond the United States, the Celsius system is used to determine the temperature. In the 18th century, two methods of the Celsius scale were developed: first by Swedish scientist Anders Celsius and the other by Frenchman Jean Pierre Cristin. The Celsius scale is often known as the centigrade scale since it is based on a 100℃ variation between the freezing and boiling points of water: water freezes at 0℃ and boils at 100℃. Every unit of Fahrenheit is 1.8 times the size of a degree Celsius due to the arrangement of the boiling and freezing temperatures. Celsius, the same as Fahrenheit, allows for minus temperatures. The temperature of absolute zero is -273.15℃

Kelvin Scale

The British physicist William Thompson, afterwards Lord Kelvin, changed the Celsius scale into the Kelvin scale in the 19th century. Kelvin was created with the goal of bringing the temperature scale’s zero point to absolute zero. As a result, absolute zero is 0 K, as Kelvin doesn’t really require degrees in its representation. By multiplying a Celsius temperature by 273.15, you can transform it to Kelvin. Water freezes at 273.15 degrees Celsius whereas boils at 373.15 degrees Celsius. Kelvin temperature is broadly applied in scientific computations and calculations for its direct relationship to absolute zero. Like, the ideal gas law employs Kelvin as its standard unit to represent the link among mass, pressure, temperature, and volume.

Rankine Scale

The Rankine scale provides an absolute zero-based comparable to the Fahrenheit scale, although it is not normally utilized outside of specific U.S. technical aspects. In a nutshell, it’s the equivalent of Kelvin on the Celsius scale for the Fahrenheit scale. The scale was developed in the 19th century by Scottish physicist William John Rankine, immediately after the Kelvin scale. Temperatures can be changed from Fahrenheit to Rankine by adding 459.67. As a result, absolute zero is found at 0 degrees Rankine. Water freezes at 491.67 degrees R, and boils at 671.67 degrees R.

Conversions

From Celsius to Fahrenheit

A mathematical equation, as shown below, can be used to convert units from Celsius to Fahrenheit.

f=9/5×c+32 

In this formula,

The temperature in Fahrenheit is denoted by the letter F.

The temperature in Centigrade is denoted by the letter C.

As an example,

To convert 2 degrees Celsius to Fahrenheit, use the following formula: –

f=95  ×2+32 

As a result, F should be set to 35.6 degrees Fahrenheit.

From Fahrenheit to Celsius

A mathematical equation can be used to convert units from Fahrenheit to Celsius, as shown below.

c=5/9f-32 

In this formula,

The temperature in Fahrenheit is denoted by the letter F.

The temperature in Centigrade is denoted by the letter C.

Conclusion

The physical attribute of an object or body is commonly referred to as temperature. It is stated as a notion for determining the degree of heat or cold on a body’s surface. Whenever the temperature of an object is measured, the different temperature measurements are used to express it. By defining the quantity, the usage of temperature units makes it broadly suitable

The Celsius scale is a temperature scale based on the boiling point of water being 100° and the freezing point of water being 0℃. Originally, 1000° was used to represent the freezing point of water and 0℃ was used to represent the boiling point of water.

faq

Frequently Asked Questions

Get answers to the most common queries related to the NEET UG Examination Preparation.

What is temperature?

Ans. Temperature is a physical parameter that measures how hot or cold something is. When a body comes into c...Read full

What is the Celsius scale?

Ans. The degree Celsius is a temperature unit on the Celsius scale, which was formerly known as the centigrad...Read full

What is the Fahrenheit scale?

Ans. Fahrenheit is a temperature scale in which water freezes at 32 degrees Fahrenheit and boils at 212 degre...Read full