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Curated by: Khan Academy India - English (28 videos)
Welcome to another exciting video where we break down Surface Energy and Surface Energy Density in the simplest way possible! 🌊🧪 0:00 - Introduction to Surface Energy & Surface Energy Density 0:05 - Why we need to understand Surface Tension first 0:14 - Insect on water and the elastic sheet analogy 0:28 - Surface tension explained with water in a container 0:40 - Comparing molecules inside vs. on the surface 1:12 - Energy levels of surface vs. internal particles 1:55 - What is Surface Energy? (Definition) 2:10 - Explaining surface energy with increasing surface area 2:38 - DIY Soap Film Demonstration 2:57 - Stretching soap film and doing work 3:22 - Force required to stretch the soap film 3:46 - Two surfaces of the soap film 4:15 - Work done to increase surface area 4:49 - Deriving the formula for Surface Energy 5:01 - Increase in surface area of the soap film 5:30 - Defining Surface Energy Density 5:57 - Surface energy density equals surface tension 6:12 - Comparison of units and definitions 6:35 - Summary and closing Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Chandan Ganotra