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1. An inventor claims to have developed a food freezer that at steady state requires a power input of 0.6 kW to extract energy by heat transfer at a rate of 3000 J/s from freezer contents at 270 K. Evaluate this claim for an ambient temperature of 293 K.
2. An inventor claims to have developed a refrigerator that at steady state requires a net power input of 0.7 horsepower to remove 12,000 Btu/h of energy by heat transfer from the freezer compartment at 08F and discharge energy by heat transfer to a kitchen at 708F. Evaluate this claim.
air is contained in a vertical cylinder fitted with a frictionless piston and a set of stops. the atmospheric pressure
Two slender rods of negligible weight are pin-connected at A and attached to the 18-lb block B and the 80-lb block C as shown. The coefficient of static friction is 0.55 between all surfaces of contact. Determine the range of values of P for which..
A hypothetical metal has an HCP crystal structure with the ideal c/a ratio (1.633). What is the volume of its unit cell, if the atomic radius is 1.3A?
The use of commercial software packages has allowed Life Cycle Assessments to be undertaken more rapidly and easily. Your task is to investigate the software packages that are available, and give an overall review of the ways in which they make t..
The second cycle receives energy by heat transfer from the reservoir at temperature T and rejects energy by heat transfer to a higher- temperature reservoir at 1440 K. If the heat pump cycles have the same coefficient of performance, determine (a)..
ocean temperature energy conversion otec power plants generate power by utilizing the naturally occurring decrease with
a piston cylinder system containing 0.5 kg of air is compressed from a volume of 0.35 m3 to a volume of 0.1 m3. if the
a computer consists of an array of five printed circuit boards pcbs each dissipating pb 20w of power. cooling of the
On which of these systems would you expect slip to ?rst occur as the applied stresses increased? Assuming slip on that system, determine the ratios of the strains, ε2/ε1 and ε3/ε1.
An accelerometer is being designed to measure up to 6664 Hz while remaining under 1.7% error. If the natural frequency of the accelerometer is 9613 Hz, determine the damping ratio that will provide 1.7% error.
Air is compressed at steady state from 100 kPa, 300 K, to 600 kPa, 440 K with a mass flow rate of 4 kg/s. Heat transfer occurs at a rate of 42.3 kJ/kg of air flowing to cooling water circulating in a water jacket enclosing the compressor.
Overview of the FGD technologies and the principles of the total design approach - Discuss in groups the main issues of design choice. The group approach, whether arranged formally or informally, is the best way to gain the wide overall view requir..
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