Take Test: Lecture Exam 2 over Chapters 5-7- Requires Respondus LockDown Browser

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Take Test: Lecture Exam 2 over Chapters 5-7- Requires Respondus LockDown Browser Test Information Timed Test This test has a time limit of 1 hour.This test will save and submit automatically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. Multiple Attempts Not allowed. This test can only be taken once. Force Completion Once started, this test must be completed in one sitting. Do not leave the test before clicking Save and Submit. Remaining Time: 36 minutes, 25 seconds. Question Completion Status: Moving to another question will save this response. Question 23 of 342 Question 23 5 points Save Answer It is Christmas time and you have just watched "National Lampoon's Christmas Vacation" and feel inspired to put up the lights. You make a dash to the dollar store and purchase 20 strands of lights, each strand rated at 1.2 w You plug them all in to three interconnected extension cords with enough adapters so that it all fits. The only available plug in also has the 15 W refrigerator, 120 W front porch light and 455 W garbage disposer on the same circuit. As you plug in the lights, your Mom turns on the front porch light and your Dad runs an apple core through the garbage disposer and the refrigerator compressor comes on because your little brother left the refrigerator door open. What is the total power needed to run all of these necessities? The neighbors commend you on your flickering lights and the dollar store was sold out of that typel O 610 w O 22,000 Vw O 1,200 Ww 82 Amps Moving to another question will save this response. Question 23 of 34

Explanation / Answer

here,

number of strands of light , N = 20

power rating of each light strand , P1 = 1.2 W

power rating of refridgerator , P2 = 15 W

power rating of porch light , P3 = 120 W

power rating of garbage disposer , P4 = 455 W

so, the total power needed , P = N * P1 + P2 + P3 + P4

P = 20 * 1.2 + 15 + 120 + 455 W

P = 610 W

the total power needed is 610 W

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