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Chapter 13, Problem 37P
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Calculate the number of 18.5 W LED light bulbs could be powered in a year by the Hoover Dam’s power plant.

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Polarizing windows, filters, etc. are often used to reduce the amount of light that enters the lens of a camera or into a room or a car. A library atrium has an overhead skylight that lets in too much light during the day which heats up the interior of the library far too much. The building engineer installs new double paned polarizing sky lights to reduce the intensity. If sunlight, which is unpolarized, has an average intensity of 1364 W/m2 what angle should the polarizing axis of the second pane of the window make with the polarizing axis of the first pane of the window in order to reduce the intensity of the sunlight to 35% of the original value?
Please help solve both for my homework. Due soon
Q1: What is the primary process of converting solar energy into other form of energy, explain and give an example of each one of them? Q2: Determine the Sun's altitude angle , azimuth angle, and zenith angle at 5.00 P.M on December 15, 2017 for a location at 24.85° N latitude. Q3: Compare the power generated by the two shown systems 1 and 2, if each turbine have air velocity in that area was V= 5 m/sec and the air density p=1.19 kg/m³m while in system 2 to increase the air velocity we uses a truncated cone of area ration A1/A2=4. blades 5 m length, while the
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