Energy Conservation

Step 1: The relationship between the tensions at the interfaces is governed by the forces acting at the point of contact. The tensions are related by the equilibrium condition at the solid-liquid interface. At the solid-liquid interface, the angle of contact plays a crucial role in determining the relationship between the tensions. The forces acting along the surface are balanced, and the equation of equilibrium is given by: where: - is the tension at the liquid-air interface, - is the tension at the solid-air interface, - is the tension at the solid-liquid interface, - is the angle of contact at the solid-liquid interface.

Step 2: The above equation satisfies the condition for equilibrium, where the components of the tensions along the interface balance out. Therefore, the correct relation is: