Tyler Hardy
06/19/2023 · Elementary School

4. An Electric Water Heater draws 65 A from a 400 V generator source. The heater is operated on the average 9 hours every day. a) How much power does the heater consume? b) How much energy in KWH does the heater consume in three weeks ( 21 days)? c) At \( \$ 0.17 \) per KWH, how much does it cost to operate this heater for three weeks ( 21 days) period d) This same Electric Water Heater is being used to heat 5.0 Kg of water for industrial purpose every 4 minutes. If \( 80 \% \) of the heat during the 4 minutes is absorbed by the water, what is the change increase in the water temperature during this period of time? Cp of water \( =4180 \mathrm{~J} / \mathrm{Kg}^{\circ} \mathrm{C} \)

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a) Power consumed: 26 kW b) Energy consumed in 21 days: 4914 kWh c) Cost to operate for 21 days: \$835.38 d) Change in water temperature: 238.7 °C

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