CAAS SAR-66 Module 2 Physics Practice Questions - CAAS SAR-66 Basic Knowledge Examination - Module 2 Physics Exam

In fluid mechanics, what is the key difference between cohesive forces and adhesive forces?

Cohesion is the attraction between like molecules, whereas adhesion is the attraction between unlike molecules. Cohesion occurs only in gases, whereas adhesion occurs only in liquids. Adhesion is the attraction between like molecules, whereas cohesion is the attraction between liquid and solid surfaces. Cohesion creates capillary depression, whereas adhesion eliminates surface tension.

Correct Answer:

Cohesion is the attraction between like molecules, whereas adhesion is the attraction between unlike molecules.

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