Which of the following concepts is a method of heat transfer that does not require a material medium?

A quantity of water at 0 °C is heated to 30 °C. For each degree rise in temperature, its density will---------

The relationship between the coefficient of linear expansion \(\alpha\) and volumetric expansion (\(\gamma\)) is-----------------

The amount of energy required to change a kilogram of ice block into water without a change in temperature is?

According to kinetic theory of gases, the pressure exerted by the gas on the wall is equal