Energy and Power

Reminder that the Energy Audit, which I gave you two weeks ago, is due Friday 10/27.
This means that you need to keep track of all the things that you use in your house for a 24 hour period.
AND you need to examine an electrical bill, and your electric meter
Learn about reading the meter here:
http://www.dom.com/customer/vares_meter.jsp
(the image to the right has a reading of 01074 )

And here's a copy of my electric bill (an overestimation from a few months ago)
There are several factors to determining the total cost.
One is the actual cost divided by the total kWh used.
What dominion power prefers to do is take the "supply service" charge divided by the total kWh used. This way they can ignore the distribution service (which is also based on the amount used).

I used 2348 kWh of electricity in 32 days, and it costs me $174.96.
Thus, the cost was about 7.4 cents per kWh, and I used 73.4 kWh of electricity per day.
That is equivalent to having about 50 lightbulbs (60 Watts) turned on continuously.
OR, two space heaters running nonstop (1500 Watts)

There is also a homework assignment for resistance/power equation stuff coming up.