| Solid and liquid contact, contact surface tends to shrink, the liquid can not be attached to the solid on the phenomenon. Such as mercury can not be attached to the glass, the mercury into the glass containers, mercury and glass wall contact position angle of more than 90 °, show that the contact surface tends to shrink, that is, no infiltration of mercury glass. Water can not be attached to the wax on, indicating water is not infiltrating paraffin. |