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1) Assume that the annual US power consumption is 2.5 1020 Joules. If this energy could...
The total annual U.S. energy consumption is about 2×1020 joules. With current technologies and solar collectors...
The total annual U.S. energy consumption is about 2×1020 joules. With current technologies and solar collectors on the ground, the best we can hope for is that solar cells will generate an average (day and night) power of about 180 watts/m2 . What total area would we need to cover with solar cells to supply all the power needed for the United States? Give your answer in both square meters and square kilometers.
BoNUs: Energy Storage Consider the capacitor as a device for storing energy. The practical limitation on...
BoNUs: Energy Storage Consider the capacitor as a device for storing energy. The practical limitation on the potential difference between the plates of a capacitor is the "dielectric strength" of the dielectric material between the plates. This is the maximum field strength that can exist without causing a spark. It is typically on the order of 107 v/m for a good liquid dielectric with K ะ 2.3 and ะ 1 g/cm3 (a) Neglecting the weight of the electrodes and case,...
TABLE 4.1 Energy Comparisons Energy Joules) Item Energy of sunlight at Earth (per m- per second)...
TABLE 4.1 Energy Comparisons Energy Joules) Item Energy of sunlight at Earth (per m- per second) Energy from metabolism of a cand 1.3 x 103 Energy needed to walk for 1 hour of a candy bar 1 hour 100 km/hr Kinetic energy of a car going 100 kr 1 X 106 1 x 106 1 X 106 1x10² Daily food energy need of average adult Energy released by burning 1 liter of oil Thermal energy of parked car Energy released...
could you please answer all questions. like and comment are rewarded. 1. An electron decays from...
could you please answer all questions. like and comment are
rewarded.
1. An electron decays from its first excited state to its ground state in a 1-dimensional infinite square well of width 5.0 nm, emitting a photon. Calculate the wavelength of the photon. 2. A water turbine with diameter 40 cm is driven by a flow with constant speed. The turbine is fully immersed in the flow, and the generator driven by the turbine con- verts the energy of the...
1. 1. The primary energy savings in tep (1 MWh -0.086 tep) and diesel, which involves the direct use of heat from a geothermal resource to cover a heat demand of 100 kW for 3,500 h / year, assum...
1. 1. The primary energy savings in tep (1 MWh -0.086 tep) and diesel, which involves the direct use of heat from a geothermal resource to cover a heat demand of 100 kW for 3,500 h / year, assuming that this demand will be covered with diesel boiler of average yield 0.8 (for diesel 1.12 tep/ton gas oil), they are: a) 30.1 tep/year, 26.9 ton/year b) 37.6 tep/year, 33.6 ton/year c)41.2 tep/year, 36.8 ton /year 1. 2. A hydraulic pump...
Please answer all PROBLEM 1 A three-litre four-stroke diesel engine develops 12 kW per m3 of...
Please answer all PROBLEM 1 A three-litre four-stroke diesel engine develops 12 kW per m3 of free air inducted per minute. The volumetric efficiency is 82 % at 3600 rpm referred to atmospheric condition of 1 bar and 27 oC. A rotary compressor which is mechanically coupled to the engine is used to supercharge the engine. The pressure ratio and the isentropic efficiency of the compressor are 1.6 and 75 % respectively. Calculate the percentage increase in brake power due...
1/ Sirius A has a luminosity of 9.98 x 10^27 W and a surface temperature of...
1/ Sirius A has a luminosity of 9.98 x 10^27 W and a surface temperature of about 9400K. What is its radius? A/ r = 7.56 x 10^8 m B/ r = 1.34 x 10^9 m C/ r= 1.26 x 10^13 m D/ r = 7.94 x 10^-14 m 3/ which of the following stellar properties is the most fundamental to a star’s main-sequence and post-main sequence life? A/ temperature B/ mass C/ luminosity D/ radius 4/ Stars Moppit and...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
BoNUs: Energy Storage Consider the capacitor as a device for storing energy. The practical limitation on the potential difference between the plates of a capacitor is the "dielectric strength" of the dielectric material between the plates. This is the maximum field strength that can exist without causing a spark. It is typically on the order of 107 v/m for a good liquid dielectric with K ะ 2.3 and ะ 1 g/cm3 (a) Neglecting the weight of the electrodes and case,...
TABLE 4.1 Energy Comparisons Energy Joules) Item Energy of sunlight at Earth (per m- per second) Energy from metabolism of a cand 1.3 x 103 Energy needed to walk for 1 hour of a candy bar 1 hour 100 km/hr Kinetic energy of a car going 100 kr 1 X 106 1 x 106 1 X 106 1x10² Daily food energy need of average adult Energy released by burning 1 liter of oil Thermal energy of parked car Energy released...
could you please answer all questions. like and comment are
rewarded.
1. An electron decays from its first excited state to its ground state in a 1-dimensional infinite square well of width 5.0 nm, emitting a photon. Calculate the wavelength of the photon. 2. A water turbine with diameter 40 cm is driven by a flow with constant speed. The turbine is fully immersed in the flow, and the generator driven by the turbine con- verts the energy of the...
1. 1. The primary energy savings in tep (1 MWh -0.086 tep) and diesel, which involves the direct use of heat from a geothermal resource to cover a heat demand of 100 kW for 3,500 h / year, assuming that this demand will be covered with diesel boiler of average yield 0.8 (for diesel 1.12 tep/ton gas oil), they are: a) 30.1 tep/year, 26.9 ton/year b) 37.6 tep/year, 33.6 ton/year c)41.2 tep/year, 36.8 ton /year 1. 2. A hydraulic pump...
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