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Air at 1 atm and 285 K enters a 2-m-long rectangular duct with cross section 75 mm × 150 mm. The duct is maintained at a constant surface temperature of 400 K, and the air mass flow rate is 0.10 kg/s. Determine the heat transfer rate from the duct to the air and the air outlet temperature.
what is an exergy factor? 8 what is a pinch point and what is it used for? 9 what does the compressor in figure 2 do?
MSE 2010:we talk about several general classes of materials: metals, polymers, ceramics, glasses and composites. We know that these are just the basic categories and we've discussed several specific examples, but this is nowhere near an exhaustive..
In any groups of seven guests, there are two guests who do know each other. At the end of the party, everyone gives a present to all the guests he or she knows. Prove that the total number of gifts given is at most 6n
1. consider a conical pendulum that is a ball of mass m at the end of a string of length li moving in a horizontal
a team of astronomers have proposed to construct a large parabolic telescope mirror by spinning a cylindrical container
The average high and low temperatures in Dayton OH in September are about 77Fand 56F, respectively. What is the high temperature reported in (a) K, (b) C, and (c) R? What is the dismal temperature difference (delta T=21 F) when reported in (d) K, (e)..
the brakes of a 1350 kg car are released and the car is held in place on the plane surface by the cable ab. the cars
All streets other than the highway are small residential streets. The small bridge has a weight limit less than the weight of the empty collection vehicle.
A steel bar AC of length 6in and a varying cross-section is loaded as shown in fig 1. The bar is supported by a pin joint at A. which is made of an aluminum pin of unknown diameter.
airflow through a long 0.2 m2 air conditioning duct maintains the outer duct surface temperature at 10 c. if the
H2O is used by a turbine operating at steady state with a mass flow rate of 4 lbm/s. The water at the inlet is 140 PSI and 1000oF and at the outlet it is 2 psi. Knowing the power developed is 1,600 Btu/s, what is the isentropic efficiency?
The mass of all the air in the atmosphere contained above a 1-m2 area is to be contained in a spherical volume. Estimate the diameter of the sphere if the air is at standard conditions.
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