Thread:Balu.ur/@comment-25501845-20141020151622/@comment-25143095-20141020154005

just do a search ...

https://www.khanacademy.org/search?page_search_query=Buoyancy

https://www.khanacademy.org/search?page_search_query=Flotation

https://www.khanacademy.org/search?page_search_query=Archimedes+Principle