An ideal thermometer should have

$A$ 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 ............. $^{\circ} C$.

Water has maximum density at

If the two temperatures on the Fahrenheit scale differ by $54^{\circ}\text{F}$, then the difference in temperature on the Celsius scale is (in $^{\circ}\text{C}$)

What is the base of the absolute temperature scale?

On the centigrade scale,the temperature of a body increases by $30$ degrees. The increase in temperature on the Fahrenheit scale is ..............