The wet between liquid and solid depends on molecule gravitation between liquid molecules or liquid and solid.If the molecule gravitation between liquid and solid is more than the molecule gravitation between liquids,liquid molecule will adsorb on the surface of solid.The wet between liquid and solid depends on molecule gravitation between liquid molecules or liquid and solid. If the molecule gravitation between liquid and solid is more than the molecule gravitation between liquids, liquid molecule will adsorb on the surface of solid