In the absence of an atmosphere,the average temperature on the surface of the Earth would be . . . . . . .

$A$ new temperature scale uses $X$ as a unit of temperature,where the numerical value of the temperature $t_x$ in this scale is related to the absolute temperature $T$ by $t_x = 3T + 100$. If the specific heat of a material using this unit is $1400 \, J \, kg^{-1} X^{-1}$,its specific heat in the $SI$ system of units is:

At $NTP$,water boils at $100^{\circ}C$. Deep down in a mine,water will boil at a temperature:

Standardisation of thermometers is obtained with

Maximum density of $H_2O$ is at the temperature

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