Task: Text Categorization
Input (English): The strength of this phenomenon can be measured using the Wilhelmy plate method. The dispersion relation for water waves has two terms, one governed by gravity and one governed by this phenomenon. The strength of this phenomenon is usually measured in dynes per centimeter, as it has dimensions of energy over area. The strength of this phenomenon is lowered by surfactants, and it arises because liquid molecules at an interface experience attractive hydrogen bonds only from one side. For 10 points, name this phenomenon which allows water striders to walk on water, a cohesion observed in liquids on their interface with air.
Output (English): Science