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Green Computing The carbon footprint of computers running the Internet is expected to exceed that of air travel by 2020. The world's data centers emit more gas than do people living in Argentina and the Netherlands, which have a combined population of 57.2 million. As you learned in Innovative Computing 14-1 on page 740, companies are developing unique data center solutions to cope with the massive electricity demands. View online Web sites that provide information about green data centers. Which countries can profit from IBM's Liebert SiteScan? How can companies benefit by adopting the Corporate Average Data Efficiency (CADE) metric? Which countries have the world's lowest and the highest electricity rates? How are companies adopting solar power? Write a report summarizing your findings, and include a table of links to Web sites that provide additional details.
in the rectangle in the drawing a charge is to be placed at the empty corner to make the net force on the charge at
Calculate the required spring stiffness so that only 10% of the force is transmitted to the ground when the fan is running at 10,000 rpm.
water initially saturated vapor at 4 bar fills a closed rigid container. the water is heated until its temperature is
Air flows from a tank maintained at 5 MPa absolute and 20°C. It exits a hole and reaches a pressure of 500 kPa absolute. Assuming an adiabatic, quasi-equilibrium process, calculate the exiting temperature.
1. List the four major kinds of inorganic contaminants and the two major kinds of organic contaminants in syngas. 2. Six distinct approaches for removing tar from syngas. List these and provide a brief description of each.
a piston-cylinder assembly contains 2 lb of water initially at 300degf. the water undergoes two processes in series
The squeezing of the sand results in a shear deformation, and in this dilatant material this is accompanied by a volume expansion of the assembly of granular particles. This means that the pore volume increases, and thus water is drawn into the ba..
a type e thermocouple is placed in an oven and connected to a dmm. the temperature surrounding the dmm is 30 degrees
a 20 mm diameter steel bar is to be used as a torsion spring. if the torsional stress in the bar is not to exceed 100
nitrogen at 80 kpa and 400 k enters an adiabatic diffuser steadily at a flow rate of 6000 kgh at 230 ms and leaves at
According to Equations (20.10) and (20.11), yielding is possible under a state of pure hydrostatic tension, σH. Find that value of σ H according to both equations if the tensile and compressive yield strengths are 80 and 100 MPa, respectively.
A polutry farm owns 100 laying hens. Each week a hen can either lay 12 eggs or hatch 4 eggs, but not both. At the end of the four-week period all eggs and chicks will be sold: an egg will bring 10 cents, and a chick will bring 60 cents.
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