ch26-p046 - 46. The mass of the water over the length is m...

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4 (2256 kJ / kg)(0.018 kg) 4.06 10 J QL m == = × . The thermal energy is supplied by Joule heating of the resistor: 2 QP tIR t = ∆= . Since the resistance over the length of water is ( )( ) 5 52 150 m 0.120 m 1.2 10 15 10 m w L R A ρ Ω⋅ = × × , the average current required to vaporize water is
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