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Curated by: Khan Academy India - English (28 videos)
Learn how to derive the formula for excess pressure in different cases: ✅ Liquid drops ✅ Air bubbles in liquids ✅ Soap bubbles Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! (add course link here) 0:00 – Introduction to Excess Pressure 0:09 – 3 Scenarios: Liquid Drop, Air Bubble in Liquid, Soap Bubble 0:24 – What is Excess Pressure? 0:43 – Surface Tension and Pressure Difference 1:33 – Derivation: Excess Pressure in Liquid Drop 2:10 – Surface Energy and Surface Tension 2:46 – Increase in Surface Area 3:29 – Work Done = Increase in Surface Energy 4:26 – Using Work Done = Force × Displacement 5:27 – Final Formula: Excess Pressure in a Liquid Drop (2σ / R) 6:09 – Excess Pressure in Air Bubble inside Liquid 6:49 – Excess Pressure in Soap Bubble 7:45 – Final Formula for Soap Bubble (4σ / R) 8:08 – Summary and Outro 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