The triple point of water is

$A$ thermometer graduated according to a linear scale reads a value $x_0$ when in contact with boiling water,and $x_0/3$ when in contact with ice. What is the temperature of an object in ${}^oC$,if this thermometer in contact with the object reads $x_0/2$?

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:

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

At what temperature in $^\circ F$ is the density of water maximum?

The graph $AB$ shown in the figure is a plot of the temperature of a body in degree Celsius $(C)$ versus degree Fahrenheit $(F)$. Then: