LEARNATHON
III

Competition for grade 6 to 10 students! Learn, solve tests and earn prizes!

### Theory:

The degree of hotness or coolness of a body is measured by its temperature. The higher the temperature, the hotter the body.

Kelvin is the SI unit of temperature ($$K$$). Celsius ($$°C$$) is used in everyday applications. A thermometer is used to determine the temperature.

There are three temperature scales, they are
• Fahrenheit scale
• Absolute scale or Kelvin scale

Fahrenheit scale:
The freezing and boiling points in Fahrenheit are $$32$$ degrees Fahrenheit and $$212$$ degrees Fahrenheit, respectively. The interval has been broken down into $$180$$ segments.

Celsius scale:
The freezing and boiling points on the Celsius scale (also known as the centigrade scale) are $$0°C$$ and $$100°C$$, respectively. The interval has been broken down into $$100$$ pieces.
The formula to convert a Celsius scale to Fahrenheit scale is:

$F=\frac{9}{5}\left(C+32\right)$
The formula for converting a Fahrenheit scale to Celsius scale is:

$C=\frac{5}{9}\left(F-32\right)$

Kelvin scale(Absolute scale):

Kelvin scale is also known as the absolute scale.  Absolute zero, or $$0$$ $$K$$ on the Kelvin scale, is the temperature at which a substance's molecules have the lowest possible energy. At $$273.16$$ $$K$$, the solid, liquid, and gaseous phases of water can coexist in equilibrium.
Kelvin is defined as $$1/273.16$$ of the triple point temperature.
The formula for converting a Celsius scale to a Kelvin scale is:

$K=C+273.15$

Temperature scales
Reference:
https://commons.wikimedia.org/wiki/File:Temperature_Scales.png