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

Is the bulb of a thermometer made of a diathermic or adiabatic wall?

Maximum density of $H_2O$ is at the temperature

Water has maximum density at

What does temperature measure? Write the $SI$ unit of temperature.

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