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An immersion heater used to boil water for a single cup of tea plugs into a 120 V outlet and is rated at 350 W .
A) What is the resistance of the heater? I know its 120^2/350= 41 Ohms
B) Suppose your super-size, super-insulated tea mug contains 350 of water at a temperature of 17 . How long will this heater take to bring the water to a boil? You can ignore the energy needed to raise the temperature of the mug and the heater itself.
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