Q4: Discuss the following phrase "The magic numbers are accounted for on the basis of energy gaps between two levels rather than filling-up of energy shell".
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- (b) Wind energy is a dynamic form of solar energy. Explain, how?.(a) Calculate the power per square meter reaching Earth's upper atmosphere from the Sun. (Take the power output of the Sun to be 4.001026 W.) (b) Part of this is absorbed and reflected by the atmosphere, so that a maximum of 1.30 kW/m2 reaches Earth's surface. Calculate the area in km 2 of solar energy collectors needed to replace an electric power plant that generates 750 MW if the collectors convert an average of 2.00% of the maximum power into electricity. (This small conversion efficiency is due to the devices themselves, and the fact that the sun is directly overhead only briefly.) With the same assumptions, what area would be needed to meet the United States' energy needs (1.051020J) ? Australia's energy needs (5.41018J) ? China's energy needs (6.31019J) ? (These energy consumption values are from 2006.)Assignment - 4. Do We Need Both Nonrenewable and Renewable R.. Attempt 1 of 2 ASSIGNMENTS COURSES 4 10 11 12 Which of the following accounts for 38 percent of non-fossll fuel consumptlon In Germany? O hydroelectric O solar energy O wind O wood NEXT QUESTION READ NEXT SECTION O ASK FOR HELP TERM O2014 Glynlyon, Inc. All rights reserved. f9 f10 >> f8 f6 10 米 IO & 7 %23 %24
- Starting from mass and energy balances, develop the equations to calculate the mass of methane fuel needed if you want to burn it along withQUESTIONS 1. a) The earth's inner core is just a few hundreds of degrees less than the temperature of the Sun: about 5200 degrees Celsius versus about 6000 Degrees Celsius. With that much heat in the centre of the earth, why is it still possible for life to exist on the surface of the earth? b) How is the heat in the earth's centre able to melt the outer core but not the inner core? 2). a). Describe the Goldsmith Classification of element. b). Describe how Goldsmith rules are used to classify Elements. c). Describe how the bonding types and magma differentiation aids in the distribution of trace elements in the EarthCan you help explain this question? The answers are: a) C decreases, (b) stays the same, (c) E stays the same. (d) delta V increases (e) The energy stored increases.
- Estimate how many large maple trees would be needed to run a dishwasher for one year. Assume the dishwasher uses 1.1 ×108Jof energy per year and a large maple tree captures 10 kg of carbon (in CO2) per year. Assume the power plant that generates the electricity is 37 %% efficient at converting the carbon in coal to electrical energy and that typical coal releases 40,000 kg of carbon (as CO2) per terajoule of energy when burned.Examine the pros and cons of nuclear energy. Why is continuous nuclear fusion as an energy source being researched so eagerly?Explain how critical temperature and critical pressure occur. You can also site an example to thoroughly explain.
- Determine the Miller indices. Don't skip any mathematical solution and solve it step by step. thank youWind farms in Washington have a capacity of 3075 Megawatts (mega means million remember so this is 3075000000 watts). This means if they were all operating at the same time this is how many Joules per second they would produce. a) Assume all wind farms in Washington are operating at capacity. How much energy in Kwh is produced in one hour? b) Now it is not windy all the time, so suppose only 60% of the wind farms are operating. How much energy is produced in a 7 day week by these wind farms c) An average home uses about 250 KWh for a 7 day week. How many homes can be operated by the wind farms in part b2-) Calculate the resulting CO2 concentration in the atmosphere 30 years from now assuming that we will use only coal to generate electricity. Assume efficiencies of 40 % for power plants. The current CO2 level in the atmosphere is 370 ppm by volume. Assume that all of the atmosphere's mass is within 11 km of the planetary surface. Is this a reasonable value? If it is not, state some reasons. State all your assumptions. NOTE: PLEASE DO NOT ANSWER IF YOU ARE GOING TO SOLVE PARTIALLY!!!
