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Air is compressed steadily in a compressor from 100kPa and 300 K to 1 Mpa and 500 K. The compressor is not well insulated and a heat loss of 40 KJ/kg occurs during the process. Assuming the changes in kinetic and potential energies are negligible, determine the specific work input to the compressor, in kj/kg.
The force F required to compress a spring a distance x is given by F - Fo = kx where k is the spring constant and Fo is the preload. Determine the work required to compress a spring, whose spring constant is k = 37 kN/m, a distance of 2 cm starting f..
a rigid tank contains a two-phase mixture consisting of 0.2 lb of liquid water and 0.1 lb of water vapor initially at a
what would be the final temperature of an average natural gas at 320of when the pressure is dropped from 3000 to 1800
A mixture of H2O 67.5% liquid and 32.5% vapor is in a closed, rigid container at 4 bar. The water is heated to 400 oC, determine the work and heat transfer, in kJ
tests reveal that a normal driver takes about 0.75 seconds before he or she can react to a situation to avoid a
assuming that the solid shaft has been replaced by a hollow shaft of the same cross-sectional area and with an inner diameter equal to half of its own outer diameter.
A flat plate maintained at a temperature of 50 C experiences a flow of atmospheric air at 15 C. If the temperature gradient at the plate's surface at a given downstream location is -43 C/mm, what is the local heat transfer coefficient?
saturated vapor at 400 kia flowing in a line is taken out through a valve to 100 kpa. what is the temperature in c as
At what equivalence ratio for octane-air mixtures does the carbon to oxygen ratio of the system equal one? Why is this of interest?
What is differential levelling? list the procedure for carrying out a differential levelling exercise where one point is beyond the range of the instrement . 100 word limit
At the proportional limit, a 1.5-in. gage length of a 0.375-in.-diameter alloy rod has elongated 0.0081 in. and the diameter has been reduced 0.00071 in. The total tension force on the rod was 5.62 kips.
the refrigerator steadily receives a power input of .15kw while rejecting energy by heat transfer to the surroundings
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