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March 27, 2017

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An electric immersion heater is rated 5 A when connected to a 120V circuit. What is the resistance of the heater? If it takes 168 KJ to heat 500 ml of water from 20 deg C to boiling, how long does it take to heat the water?

  • Physics - ,

    R = V/I = 24 ohms
    Power = V*I = 600 J/s

    600*t = 168,000 J

    Solve for t in seconds

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