$A$ thermoelectric thermometer is based on:

The water on the surface of a lake is just about to freeze. The most likely temperature at the bottom of the lake is (in $^{\circ} C$)

$A$ uniform thermometer scale is at steady state with its $0 \, cm$ mark at $20^{\circ} C$ and $100 \, cm$ mark at $100^{\circ} C$. The temperature of the $60 \, cm$ mark is ............. $^{\circ} C$.

$A$ centigrade and Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit temperature observed is $140^{\circ} F$. At that time the temperature registered by the centigrade thermometer is (in $^{\circ} C$)

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

What is the difference between $^oC$ and $^oF$ thermometer values for freezing and boiling points of water?