What is absolute zero temperature?

The melting point of ice and the boiling point of water are marked as $20^o X$ and $150^o X$ respectively on a thermometer. What will be the temperature of $60^o C$ on this scale?

What is the value of absolute zero temperature on the Fahrenheit scale?

Write the equation that gives the relation between $t_F$ and $t_C$.

Two thermometers $X$ and $Y$ have ice points marked at $15^{\circ}$ and $25^{\circ}$ and steam points marked as $75^{\circ}$ and $125^{\circ}$ respectively. When thermometer $X$ measures the temperature of a bath as $60^{\circ}$ on it,what would thermometer $Y$ read when it is used to measure the temperature of the same bath? ...... $^{\circ}$

Mercury boils at $367^{\circ}C$. However,mercury thermometers are made such that they can measure temperatures up to $500^{\circ}C$. This is achieved by: