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Courses on Khan Academy are always 100 free. Start practicingand saving your progressnow: Sal explains the difference between liquids and gasses both fluids. He then starts a calculation of the work done on a liquid in a U-shaped container. Created by Sal Khan. Watch the next lesson: Missed the previous lesson? Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. Well start by looking at motion itself. Then well learn about forces momentum energy and other concepts in lots of different physical situations. To get the most out of physics youll need a solid understanding of algebra and a basic understanding of trigonometry. About Khan Academy: Khan Academy offers practice exercises instructional videos and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math science computer programming history art history economics and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art adaptive technology that identifies strengths and learning gaps. Weve also partnered with institutions like NASA The Museum of Modern Art The California Academy of Sciences and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academys Physics channel: Subscribe to Khan Academy: ,
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