QUESTION 2 Which of the following best describes or defines Geothermal? O Heat energy from volcanic eruptions O Heat energy from rocks on earth's surface O Heating energy from inner core of earth Heat energy from sun QUESTION 3 Secondary energy is energy in its natural and technically unconverted form O True False
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- Consider a 400-MW, 32 percent efficient coal-fired power plant that uses cooling water withdrawn from a nearby river (with an upstream flow of 10-m3/s and temperature 20 °C) to take care of waste heat. The heat content of the coal is 8,000 Btu/lb, the carbon content is 60% by mass, and the sulfur content is 2% by mass. How much electricity (in kWh/yr) would the plant produce each year? How many pounds per hour of coal would need to be burned at the plant? Estimate the annual carbon emissions from the plant (in metric tons C/year). If the cooling water is only allowed to rise in temperature by 10 °C, what flow rate (in m3/s) from the stream would be required? What would be the river temperature if all the waste heat was transferred to the river water assuming no heat losses during transfer? Estimate the hourly SO2 emissions (in kg/h) from the plant assuming that all the sulfur is oxidized to SO2 during combustion.When 1 cu ft of natural gas is burned, 1,050 Btu of heat are produced. In oneday, a building uses 761,250 Btu of heat. How many cubic feet of gas areburned?1. If the work done 10000 cal, and the initial pressure 100 atm, when the ideal gas | expand isothermally and reversibly from the initial l volume (V1) to the final volume (10 V1), R = 1.987 cal/mole.K. ~ (A) calculate V1. (B) If there are - 2 moles from ideal gas what is the temperature.
- Explain the construction of a fixed dome biogas plants.Choose the correct answer Which of the following is the most likely concentration of the current methane at atmosphere? A. 9 ppm; B. 1.9 ppb; C. 420 ppm; D. 420 ppb The current CO2 concentration in atmosphere has approximately increased by ____% in comparison with its level in 2010? A. 2; B. 8; C. 22; D. 45 What is the original heat source in the greenhouse effect? A. Magma activities; B. sun; C. wind; D. greenhouse gases Which of the following descriptions is NOT correct at 1 atm and 0oC? 200 g CO2, 200 g CH4, and 200 g N2O gases have the same volumes; 200 moles CO2, 200 moles CH4, and 200 moles N2O gases have the same volumes; 1 mole CO2 gas has a volume of 22.4 L; CO2 has a lower global warming potential than CH4Find the temperature in Celsius at which 0.654 miles of neon will occupy 12.30 L at 1.95 atmospheres.
- Civil engineering: Energy Please solve the problem clearly , don't use previously solved solutions. I am asking this for a second time. Hope you understand Question: The atmosphere is stable with a lapse rate of -0.2 degree C/100 m. The surfaces air temperature is 15 degree C. A parcel of air is released at the ground with a temperature of 25 degree C. Calculate the maximum mixing height, in m.4. An igloo or Eskimo hut is built in the form of a hemispherical shell with an inside diameter of 12 ft. If the igloo is constructed of snow blocks having a uniform thickness of 2ft and weighing 40 lb per cu. ft, find the weight of the igloo, neglecting entrance. Also, if fresh air contains 0.04 per cent carbon dioxide, find the amount this gas in the igloo when freshly ventilated.The inside dimensions of a rectangular oil furnace are 60 centimeters wideby 1.15 meters long by 45 centimeters high. The combustion chamber iscylindrical, is 46 centimeters long, and has an outside diameter of 43centimeters. How many cubic centimeters of space are there between theinside walls of the burner and the outside walls of the combustion chamber?