PART 1: An electric air conditioning unit draws 15 amps of direct current from a

Question

PART 1: An electric air conditioning unit draws 15 amps of direct current from a 145 V direct voltage source, and is used 24 hours a day during 23.4 days in July. How much will the electricity cost for the month if the local electrical rate is 8.6 cents/kW · hr? Answer in units of $. ANSWER= 105.04

PART 2: The wire in a house circuit is rated at 21.8 A and has a resistance of 0.11 . What is its power rating? Answer in units of W. ANSWER = 52.28 W

PART 3: How much heat does the wire give off in 29.4 min? Answer in units of J.

NEED QUESTION FOR PART 3

Explanation / Answer

power consumption in a day = VI*24 hours = 52.2 kW/ hr

power consumption in a month = 52.2 kW/hr*24.3 = 1268.46 kW/hr

thus total cost = 1268.46 kW/ hr*8.6 /100= 109 $

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