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Understanding Surface Tension Video Lecture | Physics for EmSAT Achieve

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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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