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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.

If I wanted to express the power 40,000,000 W in a more convenient form, I could use the prefix notation in the SI system. Which of the following would be correct? 40 mW 40 KW 40 GW 40 MW 40 TW Which of the following are units of energy? Check all that apply. Joule Horsepower Calorie Watt kilowatt hour Kilowatt Which of the following are attributes of a passive heating solar system? Click all that apply. Relies on fluid density differences created by heating for flow Uses a fan or pump to create flow of a fluid Relies on mirrors to direct solar energy to a receiver for power production Relies on photovoltaic cells for electric heating Which is the best description of the greenhouse effect? Solar radiation passes through the atmosphere and warms the earth's surface. Some of this heat is converted into lower energy infrared radiation. The infrared radiation cannot completely pass back through the greenhouse gases in the atmosphere, causing a direct, continued warming of earth's atmosphere and surface. Solar radiation is absorbed in the earth's atmosphere by greenhouse gases. The increased concentration of these gases in the atmosphere causes greater heating of the earth's atmosphere and surface. Solar radiation directly warms the earth's atmosphere, causing convective currents and increased heating of the earth's surface. Solar radiation passes through the atmosphere, some of which then warms the earth's surface. The remainder is reflected back into the atmosphere. This reflected solar radiation is absorbed by greenhouse gases, causing an increased warming of earth's atmosphere and surface. If the annual growth rate of a population is 9 %, then in approximately how many years will it take for the population to increase by a factor of 4? Which of the following needs are met by all grid-level energy storage systems? Check all that apply. Make up for variable energy sources such as solar and wind Provide a continuous supply for energy management on the grid. Provide backup for nuclear power plants. Provide support for microgrids. Provide rapid response to changes in demand Provide emissions free energy for the grid. The main advantage of a horizontal axis wind turbine over a vertical axis turbine is __________. It is orientation neutral so that it doesn't matter which way the wind is blowing It is taller and can reach stronger winds for more power It is less costly to build and install It is shorter, where the wind strength is not too great for the blades A cart with a mass of 10 kg, initially at rest, is pushed with a force of 74 N for 7 m. What is its final kinetic energy? Give your answer in joules. Solar photovoltaic systems use inverters to ____________. convert DC power from the solar panels to AC step up low voltage from solar panels to house voltage measure the energy exported from the solar panels to the grid convert single phase AC from the solar panels to three phase AC convert AC power from the solar panels to DC Geothermal energy is most readily tapped for electricity generation where there are naturally occurring geothermal reservoirs. In flash-steam geothermal plants __________. steam from the well is used to directly drive a turbine hot water from the well is used to drive a hydroelectric turbine hot water from the well is flashed to steam before it is used to drive a turbine steam from the well is used to heat a fluid that drives a turbine

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School: University of Virginia

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Tutor went the extra mile to help me with this essay. Citations were a bit shaky but I appreciated how well he handled APA styles and how ok he was to change them even though I didnt specify. Got a B+ which is believable and acceptable.

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