Where can I find advanced math and physics lectures on DVD?

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Several users are seeking sources for purchasing advanced math and physics lectures on DVD, specifically beyond calculus 2 for math and undergraduate level for physics. While some suggest MIT OpenCourseWare for free video resources, the original poster is looking for purchasable options. The discussion emphasizes the need for quality educational materials that can be owned rather than accessed online. Recommendations for specific companies or websites that sell such DVDs are not provided. The conversation highlights a gap in the market for advanced educational DVDs in these subjects.
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does anyone know of a company/website that sells advanced math and physics lectures on dvd? i need something above calculus 2 for the math, and something at the undergraduate level for physics. thx
 
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Not exactly what you're looking for, but some MIT openware courses have videos for the entire semester.
 
thank you I'm aware of those samoth 1. I wanted something that i can purchase, but mit does have some great FREE VIDEOS.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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