Check my arithmetic.

Feb 23, 2009 28 Replies

I think I'm right but now I am second guessing myself.



If I have a 100 watt bulb that burns for 10 hours, I will use 1 kilowatt of electricty.



So if my electric costs approximately $.10 per kilowatt, it costs me ten cents to burn the bulb for 10 hours.



TIA


1 kilowatt-hour

per kilowatt-hour

Math right, terminology wrong.

Doug Miller wrote: ...

/pedant

Not "terminology"; "units"

pedant/

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Sounds right and that is around $7.20 a month. It adds up pretty quickly when you have 7 bucks here and 7 bucks there..

Feeling particularly A-R today, are you?

You can kill more than seven bucks here:

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It cost a penny per hour at $.10 Using Google......1 month in hours=

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month = 730.484398 hours x .01 = $7.30 a month

Google has some powerful conversion features.

metspitzer wrote: ...

And exactly _which_ month is it that has that odd 29 min and 3.83... seconds in it??? :)

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True but who is 0.10 per Kwh, My area of the midwest some pay 0.178 KWH.

you are correct. don't forget all the taxes and use fees they add in. the only way to find your TRUE rate per kilowatt/hour is to divide your TOTAL bill by the number of Kw/hours used. Never mind what they SAY the rate is.

On 2/23/2009 11:44 AM HeyBub spake thus:

HeyBub, you owe me that last 10 minutes of my life back. (I have dialup.)

Rating: pretty dang easy (I'm not a video-game player and I managed to shoot almost all them bucks). Oh, and the music sucks. (But whaddya want for free?)

Good point. I really didn't consider that. I was just trying to show off Google's conversion features.

hehe. That would be ME. Im at 0.08 per Kwh Nat Gas is 1.24

You can check out the averages here for electric

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Bubba

Well, they all kinda do.

Twenty-nine-plus minutes per month = about 6 hours per year and, in four years, that's about a full day, which is accounted for by a leap year.

Sorta'... :)

But in my defense I'll note that the two units are fundamentally different, not just "terminology" (another word for the same thing)...

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It comes from leap year: 400 years (4800 months) have 97 leap years (every 4, except (divisible by 100 and not divisible by 400)) and 303 non-leap years. 303*365 + 97*366 = 146097 days, *24 = 3506328 hours. Divide by 4800 to get 730.485 hours/month.

Google's number may include leap seconds or other correction I didn't have above.

Of course, anything that requires evaluating the savings over a 400 year horizon just might turn out to not be cost effective :-)

Josh

Of course.

I simply pointed out it isn't _any_ one month (and note the :) ).

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With taxes, final bill amount, dividing KWH by amount owed?

What's another word for thesaurus?

Where? It doesn't seem to be above about $.12 in the midwest according the the chart the other poster provided.

JK

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