A disc magnet is used to hold a piece of paper (0.1 mm thick) to the door of a refrigerator. The magnet is 5 cm in diameter and 0.5 cm thick. Its…

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Adiscmagnet is used to hold apiece of paper (0.1mmthick) to thedoorofa refrigerator.Themagnetis5cmindiameterand0.5 cmthick. Its mass is 100grams. Assuming thatthe coefficientoffrictionbetweenthepaper andthe refrigeratoris0.3, whatisthe minimum remanent magnetism (in Gauss) that themagnet must have in order tokeep the magnetandpaper from falling ?

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A disc magnet is used to hold a piece of paper (0.1 mm thick) to the door of a refrigerator. The magnet is 5 cm in diameter and 0.5 cm thick. Its…

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