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Physics 7 Online
OpenStudy (anonymous):

suppose the cost of electrical energy for your house is $0.14/kw-hr and your electric bill for the past month (30 days) was $110.assuming the power delivered is constant over the entire 30 days, what is the power being used? If the voltage is 120V, what is the current being drawn? If part of teh electrical use is a 100W lightbulb that is on continuously, what percentage of your electrical usage can be saved by turning it off?

OpenStudy (anonymous):

So three parts: the power used, the Voltage, and the percent saved

OpenStudy (anonymous):

have you read your book for this class?

OpenStudy (anonymous):

yes. But I am still somewhat confused with power, current, etc; and the conversions between them.

OpenStudy (anonymous):

I have P=de/dt E=QV P=IV

OpenStudy (anonymous):

but now that I think about it, I think the units confuse me the most. It takes me a while to figure them out

OpenStudy (anonymous):

what class is this for again?

OpenStudy (anonymous):

This is in my physics class. We are working on electricity

OpenStudy (anonymous):

k. I'll try to find an answer and see if that's what I get

OpenStudy (anonymous):

alright

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