Renewable Energy
9. (10%) If a homeowner with an R 4.0 house paid $350/month for his natural gas bill and the house next door had an R 14.0 house of the same area, what would you expect for the natural gas bill for the R 14.0 house?
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Renewable Energy
44. Describe what is a natural frequency of a system? (3%)
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Renewable Energy
B. Label the three damping scenarios for a SDOF system: (3%)
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Renewable Energy
What is the equation of motion for a dynamic system best described as: (1%)
a) A homogeneous second order differential equation.
b) A time dependent algebraic equation.
c) A trigonometric transcendental equation.
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Renewable Energy
List Newton's Laws. (3%)
Newton's Third Law:
Newton's Second Law:
Newton's First Law:
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Renewable Energy
What is the equation of motion for a SDOF free vibration system? Define each term in the equation. (3%)
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Renewable Energy
). Define the power coefficient for a wind turbine system: (3%)
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Renewable Energy
Comparing VAWT and HAWAT, which one causes more obstruction to birds?
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Renewable Energy
7. Comparing VAWT and HAWT, which one sways less? (1%)
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Renewable Energy
6. Name the following two vertical wind turbine systems: (2%)
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Renewable Energy
. As a result of Betz's assumption, the theoretical extractable wind power would be: (1%)
a) Larger than 60%
b) Less than 60%
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