The lenght of the mercury column of a mercury thermometer are 1.08cm and 20.98cm respectively at the standard fixed points. What is the temperature of the body which produces 8.0cm of this mercury column?

Answer 1

The standard fixed points are to be the freezing point and boiling point of water, namely 0 and 100°Celsius.
By proportions,
temperature = (8-1.08)/(20.98-1.08)*100
=34.8°C
In case of Fahrenheit,
temperature = (8-1.08)/(20.98-1.08)*180+32
=94.6°F