The knowledge of plate tectonics help people living in areas prone to earthquakes and volcanic eruptions can help by knowing the chances of the earthquake or volcanic eruption
There is two different types but i’ll just do both meanings just incase.
Graham's Law of Diffusion: the rate of diffusion of one gas through another is inversely proportional to the square root of the density of the gas.
Graham's Law of Effusion: the rate of effusion of a gas is inversely proportional to the square root of the density of the gas.
hopes this helps..!
Heat energy is needed for evaporation to happen.