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Understanding Surface Tension Video Lecture | Physics for EmSAT Achieve
FAQs on Understanding Surface Tension Video Lecture - Physics for EmSAT Achieve
| 1. What is surface tension? |  |
Ans. Surface tension is the tendency of the surface of a liquid to minimize its surface area, resulting in the cohesive forces between liquid molecules, creating a "skin" on the surface.
| 2. How is surface tension measured? | |
Ans. Surface tension is measured by the force required to break or penetrate the surface of a liquid per unit length, typically measured in units of force per unit length such as newtons per meter (N/m).
| 3. What factors affect surface tension? | |
Ans. Factors that affect surface tension include the type of liquid, temperature, presence of impurities, and the interaction between the liquid molecules.
| 4. How does surface tension affect floating objects? | |
Ans. Surface tension allows certain objects to float on the surface of a liquid, as the cohesive forces between liquid molecules create an upward force that can support the weight of the object.
| 5. How can surface tension be altered or disrupted? | |
Ans. Surface tension can be altered or disrupted by adding surfactants or detergents, which reduce the cohesive forces between liquid molecules, causing the surface tension to decrease.
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Sep 21, 2025
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