The heating coil of a hot water heater has a resistance of 20 W and operates at 210 V.How long a time is required to raise the temperature of 200 kg of water from 15 $\degree$C to 80 $\degree$C? (The specific heat for water = 10³ cal/kg* $\degree$C and 1.0 cal = 4.186 J). A)1.7 h B)3.8 h C)5.1 h D)6.9 h

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The Answer of The heating coil of a hot water heater has a resistance of 20 W and operates at 210 V.How long a time is required to raise the temperature of 200 kg of water from 15 $\degree$C to 80 $\degree$C? (The specific heat for water = 10³ cal/kg* $\degree$C and 1.0 cal = 4.186 J). A)1.7 h B)3.8 h C)5.1 h D)6.9 h

The Heating Coil of a Hot Water Heater Has a Resistance