Types of Thermometers

All thermometers have liquid material inside them. What would happen if the thermometers are filled with gases?

Name the liquids used in different types of thermometers.

The lengths of mercury thread in a mercury thermometer are given here. Length in melting ice $=20 \mathrm{mm}$, length in steam above boiling water $=170 \mathrm{mm}$, length in liquid $\mathrm{P}=50 \mathrm{mm}$. What is the temperature of liquid $\mathrm{P}$?

Observe the given diagram of a thermometer. The distance between $-{10}^{\mathrm{o}} \mathrm{C}$ and the ${110}^{\mathrm{o}} \mathrm{C}$ markings is $25 \mathrm{cm}$. If the length of the mercury thread is $15 \mathrm{cm}$ as shown in the figure, calculate the temperature measured by this thermometer.

In a laboratory, since Anushka has not got laboratory thermometer to determine the boiling point of a liquid, she used a clinical thermometer. Will she be able to measure temperature correctly? Explain.

Name any two liquid-in-glass thermometers. How do they differ from each other?