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Anonymous
timer Asked: Dec 12th, 2018
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please answer each question including Multiple choices, calculation, and energy conversions. if you are not sure correct or not, you can bold the question and answer.

Wind power is a very clean, highly renewable energy source. However, there are many challenges associated with wind technologies. What are some of these challenges? Check all that apply. It's not a renewable resource. They use fossil fuels Turbines are perceived as visually displeasing. Production is variable. They require constant fuel input According to the USDA, the energy used to produce ethanol from corn is _______ the energy output of the ethanol created. more than This is not clearly determined. less than the same as A hydroelectric dam generates electricity when water falls 33 m before striking the turbine. Assuming the system is 71 % efficient, and that 43795 kg of water fall each second, what is the power output of the dam in MW? Municipal solid waste (MSW) power plants are considered beneficial because __________. they are cheaper that fossil fuel power plants there are no air pollutants emitted by MSW plants the waste (ash) is environmentally benign the volume of landfill waste is substantially reduced Hydroelectric turbines are much smaller than wind turbines for same electrical generation capacity. This is because __________. air is more dense than water potential energy from water is higher than potential energy from air water is more dense than air air velocities are much higher than water velocities Concentrated Solar Power Plants use a variety of mirror technologies to collect solar energy from an increased _______, focusing more energy onto a central boiler, increasing the potential temperatures reached, and efficiency of eventual conversion to electricity. altitude price temperature area While there are many disadvantages that must be weighed when evaluating the various water-based technologies, there are also clear advantages. Major advantages of water-based energy technologies are that _______. Check all that apply. siting facilities is done easily the fuel is free they are highly predictable the initial investments are low there is no habitat disturbance Lithium ion (Li-ion) batteries have become the most popular type of battery sold today. However, one significant disadvantage of Li-ion batteries is that ___________. they have low cell voltages they decompose at elevated temperature they have low energy density they have low overall efficiency they have a limited number of charge/recharge cycles T/F: Hydroelectric plants do not release any greenhouse gases throughout their entire life cycle. True False Compressed air energy storage systems are a form of ___________ energy storage. thermal electrical electrochemical mechanical chemical

Tutor Answer

achiaovintel
School: Carnegie Mellon University

Hey buddy, please find attached the solution to your assignment
Attached.

Surname 1
Name
Professor
Course
Date
1. Wind power is a very clean, highly renewable energy source. However, there
are many challenges associated with wind technologies. What are some of
these challenges?
Turbines are perceived as visually displeasing.
Production is variable.
2. According to the USDA, the energy used to produce ethanol from corn is
_______ the energy output of the ethanol...

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Anonymous
Only issue was the guy's response time which was a bit long, which made me a bit anxious. Reached out to the help desk and they helped me out, turns out the tutors aren't all from US which meant there was a time difference. No issues on the quality.

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