Biology

Biology, 22.06.2019 16:40, 1kafran1

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind

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Geography, 25.07.2019 04:10, alleyboard

2018 ap environmental science free-response questions wind farm project using turbines to generate electricity is to be built along the allantic coas of he united states. it will be located about 13 km from the coast in water with an average depth of 10 m. (a) describe one environmental benefit associated with an offshore wind project. (b) identify and describe one potential economic effect of an offshore wind project. (c) describe one additional way, other than wind power, that oceans can provide renewable energy for the generation of electricity the project will consist of 200 wind turbines, each with a capacity of 4 megawatts (mw). each turbine coss s1.2 million to build. electrical demand in the area to be served by the project is expected to be 2.0x 1of mw per year. (d) calculate how much electricity (in mwh) the wind project needs to generate per year in order to provide 80% of the annual electrical demand in the service area. show all work. in the service area pay $0.20/k wh for electricity. calculate how much revenue will be produced ifthe wind turbines provide 80% of the annual electrical demand in the service area. show all work. assuming all turbines are operating, calculate how many hours the wind turbines must operate to provide 80% of the annual electrical demand in the service area. show all work. (e) customers (d)

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Geography, 21.08.2019 04:30, thanks5640

(a) what are the three ultimate sources of energy on earth? 12] (b) wind energy is the most important renewable energy source that is used to generate electricity in ireland in 2015 accounting for 22.8% of electricity consumption. if the wind flows through a horizontal axis wind turbine (swept area of the turbine a) at a speed of v, as schematically shown in figure q3(b), write an equation for the power of the wind p (i.e. kinetic energy of the wind per unit time) that flows through the wind turbine. the density of air is p wind speed v swept area of wind turbine a figure q3(b) schematic diagram of wind flowing through a wind turbine (c) according to the power of wind that you formulated using your answer to (b), specify the most 14] important factor that affects the power of wind that blows the wind turbine. (d) practically, when the wind speed is relatively high (e.g. higher than 20 m/s up to 25 m/s as shown in figure q3(d) on the next page), the wind turbine can only convert a very small part of the overall wind power (kinetic power in figure q3( to generate electricity (output in figure q3( explain the reason for the large gap between the wind power and the electrical 14] output power (e) in the history of the development of wind turbine, wind turbines have been becoming bigger and bigger. explain the benefit that we can get by building large wind turbines compared with small ones. also explain the potential challenges when wind turbines become very large.

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Biology, 26.08.2019 05:30, valenzueladomipay09u

Question 1 for a wind farm to be effective, it needs to be in a place with constant wind no wind high average wind speeds low average wind speeds 2 points question 2 which statement about energy generated from wind is true? wind is free "fuel," and government taxes on its use are lower than those on fossil fuel use. wind power gives off no greenhouse gases, but some people feel it spoils the view of the landscape. wind power uses more water than coal power plants, but it is a far safer power source for wildlife. wind power is abundant everywhere, and battery storage of excess power is very inexpensive. 2 points question 3 from where does geothermal energy come? from deep within the earth from nonrenewable energy sources from the energy captured from the sun from steam 2 points question 4 what is one benefit of using tides for energy? increased carbon dioxide production unlimited energy reduced greenhouse gases alteration to tides in area 2 points question 5 tides can be used to convert kinetic energy into electrical energy potential energy chemical energy nuclear energy 2 points

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Biology, 06.10.2019 20:00, cami06

a remote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 0 – 5 km/hr some medium-sized rivers with fast-moving currents few coal deposits rain and cloudy on many days of the year based on the above information, which energy source would be the most economical and safest for the community to pursue? a. wind b. hydroelectric c. solar d. fossil fuel

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