I don\'t understand either of the questions posted. I sort of get the first one
ID: 1466801 • Letter: I
Question
I don't understand either of the questions posted. I sort of get the first one but don't understand how we arrived at the answers. Thanks in advance!
12-The solar constant (s vectoris around 300 w/m at ground level. How much money could we save if we harnessed the solar energy falling on a 100m x 100m square area during 2 hours a day for a whole 30 day month. Assume a price of 9 cents per KWH. Ans. $70200 EIA TL 10 as Too go o h Optical instruments and the position of objects in front of a lens: In class we studied the basic cases of an object standing in front of a concave mirror. Similar positions occur in a converging lens as follows: or as an 1, 2, 3s 32ff Exercise identify the images l corresponding to each object by placing the correct numbers, 1, 2, 3, etc.by the letters L Once you have done this identify R; Uplov, Sm/ Big Which object position corresponds to a projector? Oh Its image is Which corresponds to a magnifying glass? Its image is Which two to a camera and the human eye? Their images are which to a telescope Miscellaneous conceptual questions:Explanation / Answer
intensity = power / area
1300 = power / 100^2
power = 1300 * 100^2 W
power = energy / time
2 hours for 30 days will be 60 hours
1300 * 100^2 = energy / 60
energy = 1300 * 100^2 * 60 WH or 13 * 100^2 * 6 kWH
price for 1 kWH = 9 cent
price for 1300 * 100^2 * 216 kWH = 13 * 100^2 * 6 * 9
price = 7020000 cent or $70200
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