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Mathematics 12 Online
OpenStudy (anonymous):

the wattage rating W (in wats) of an appliance varies jointly with the square on the current I (in amperes) and the resistance R(in ohms). if the wattage is 4.5 watts when the current is 0.3 ampere and the resistance is 50 ohms, find the wattage when the current is 0.5 ampere and the resistance is 300 ohms

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