Link to the playlist - Liquids and flows: ???? • Resting liquids In this video I explain what we mean by the surface tension of liquids such as water. The basic principle behind surface tension is that every liquid tries to minimize its surface, which can be understood through the interactions of the individual water molecules. There are two different definitions of surface tension. In the first definition, surface tension is energy per surface (this definition is also often referred to as surface energy) and in the second definition it is force per length. At the end of the video we will look at how you can measure surface tension. Would you like to support my channel? - Then take a look at my Patreon page: ???? / think_logic Timestamps: 0:00 - How does surface tension come about? 2:33 - Formula for surface tension and a simple example! 4:10 - Surface tension as force per length and surface energy! 7:28 - Measuring surface tension! Thumbnail graphics: https://www.freepik.com/vectors/water... - Water wallpaper vector created by rawpixel.com - www.freepik.com . Would you like to support my channel? - Here you can find my PayPal link: ????https://www.paypal.com/donate/?hosted... ????My book recommendations for studying physics???? If you buy one of my book recommendations via the Amazon links below, I will receive a small commission as an Amazon partner. These two textbooks are the standard literature for starting physics studies. I was personally very happy with the second book in the series on electricity and optics, and I still use it often today to look up certain topics. I only bought the first book at the end of the first semester, so I didn't use it that often, but it helped me a lot with certain topics for exam preparation! The books are also suitable for preparing for your studies before you start, especially since there are tasks at the end of each chapter and the solutions to these tasks are also at the back of the book. (I would probably skip the first chapter of the book Experimental Physics 1) ▶︎ Experimental Physics 1: Mechanics & Heat by Wolfgang Demtröder Amazon link: https://amzn.to/3DQBADP ▶︎ Experimental Physics 2: Electricity and Optics by Wolfgang Demtröder Amazon link: https://amzn.to/3DYgnaX After the first year of your studies, you continue with in-depth courses on theoretical mechanics, quantum mechanics and electrodynamics & statistical physics (thermodynamics). My book recommendations on these topics are partly in German and partly in English. This is because sooner or later (at the latest in the master's program) all lectures will be held in English. I have also had very good experiences with all of these books myself! ▶︎ Classical Mechanics by John R. Taylor Amazon link: https://amzn.to/3r5Eixw ▶︎ Modern Quantum Mechanics by JJ Sakurai Amazon link: https://amzn.to/3UFvJa9 I mainly used this book for my first course on quantum mechanics and was very satisfied. ▶︎ Introduction to Quantum Mechanics by David J. Griffiths Amazon link: https://amzn.to/3BMZc9w As an alternative to Sakurai's book, I also ordered this book and can definitely recommend it. All the important topics are covered, but I would tend to go for the other option. ▶︎ Introduction to Electrodynamics by David J. Griffiths Amazon link: https://amzn.to/3LIjPbw Thanks for watching!