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ie590_hw1

# ie590_hw1 - Homework#1(IE 590 Spring 2014 Due(Wednesday...

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Homework #1 (IE 590, Spring 2014) Due: 1/29/2014 (Wednesday) Notes: 1. Please submit the homework in class (at the beginning of a class). 2. You do not need to type the solutions using computers. But please be as neat as possible in terms of your handwriting. 3. Please provide necessary details in deriving your solutions. A final answer without any detailed derivations/explanations will not be given any credits, regardless if the answer is correct or not. 1. (Masters 1.3) A single conductor in a transmission line dissipates 6,000 kWh of energy over a 24-hour period during which time the current in the conductor was 100 amps. What is the resistance of the conductor? 2. (Masters 1.6) A 52-gallon electric water heater is designed to deliver 4800 W to an electric-resistance heating element in the tank when it is supplied with 240 V (it doesn’t matter if this is AC or DC). 240 V 4800 W 52 gal Figure P1.5 a. What is the resistance of the heating element? b. How many watts would be delivered if the element is supplied with 208 V instead of 240 V?

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