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The sun supplies energy at a rate of about 1.0 kilowatt per square meter of surface area (1 watt 1 J/s). The plants in an agricultural field produce the equivalent of 20. kg of sucrose (C12H22O11) per hour per hectare (1 ha 10,000 m2). Assuming that sucrose is produced by the reaction: 12CO2(g)+11H2O(l) yields C12H22O11(s) 12O2(g); delta H=5640kj calculate the percentage of sunlight used to produce the sucrose- that is, determine the efficiency of photosynthesis.
determine the analog output voltage as a fraction of the reference voltage.
The solid particles have average diameter 3 mm and piece density 730 kg/m3. Hot air at 150 ºC is blown up through the dryer belt at a volumetric flow rate of 7200 m3 /hr per m2 of belt area. Will the bed of solids on the belt fluidize?
A 100-turn coil in the configuration of Figure P12.1.3 is rotated at a constant speed of 1200 r/min in a magnetic field. The rms induced voltage across the coil is 1 kV, and each turn has a length l = 112.5 cm and a width w = 10 cm. Determine the ..
(Note: The number of parallel paths is equal to the number of poles for lap windings, while it is equal to 2 for wave windings.)
Determine the Probability that an Ahmed energy state is occupied by an election it the slide is above the Fermi level by KT.
Develop a two-dimensional addressing system using a 6-to-64 decoder, a 64-word×128- bit matrix, and 16-input multiplexers. How many gates would such a system require?
What is the size of the Anopheles gambiae genome? How many chromosomes does it have? How many genes does it have?
Calculate the parameters of the equivalent circuit shown in Figure 13.2.5(c).
Compare MACRS depreciation and straight-line depreciation: based solely on the tax effects, which depreciation method (SL or MACRS) would yield a higher net present value for the project?
Steam flows in a long, noninsulated pipe under a constant pressure of 2 bar. At the inlet of the pipe the temperature is 300 °C. Due to losses to the surroundings, the temperature at the exit of the pipe is 60 °C. Assume the surroundings to be at ..
a. Develop a general equation that relates the average value of n to the mass of a given mixture of PCBs and the mass of AgCl produced. b. A 0.1947-g sample of a commercial PCB yielded 0.4791 g of AgCl. What is the average value of n for this samp..
A process heater uses Dowtherm A heat transfer fluid to provide 850 kW of heat. Estimate the annual operating cost of the heater if the Dowtherm evaporator is 80% efficient and the price of natural gas is $4.60/MMBtu. Assume 8000 operating hours p..
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