On the Celsius scale,the temperature of a body increases by $40^{\circ} C$. The increase in temperature on the Fahrenheit scale is: (in $^{\circ} F$)

The temperature at which the reading of a Fahrenheit thermometer will be double that of a centigrade thermometer is ........ $^\circ$.

The correct value of $0^{\circ}C$ on the Kelvin scale is ........ $K$.

$A$ 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 $x_0/2$?

At what temperature is the density of water maximum? Provide the value in $^\circ C$, $^\circ F$, and $K$.

If $H_C, H_K$ and $H_F$ are the heat required to raise the temperature of one gram of water by one degree Celsius,Kelvin,and Fahrenheit temperature scales respectively,then: