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A fan drawing electricity at a rate of 1.5 kW is located within a well insulated 60 cubic meter rigid enclosure filled with air at 27 degrees C and 1 atm. After 30 minutes of steady operation of the fan, assuming ideal gas behavior, determine the final temperature in Celsius and pressure (atm) of the air
What methods are used to achieve low levels of corrosion by oxygen in boiler feed water? What measurements are essential to ensure that this is done satisfactorily, and what types of measurement could be used?
a thin walled cylindrical pressure vessel has an outer diameter of 7.50 in and wall thickness of 0.250 in with an
a refrigeration cycle is a reversed heat engine. which of the following has the maximum value of the co-efficient of
air enters a compressor at 105 kpa and 300 k with a volumetric flow rate of 12 m3min and exits at 1200 kpa and 400 k.
air at 110 kpa and 250 k is compressed steadily to 570 kpa and 400 k. the mass flow rate of air through the compressor
a boat and trailer are being pulled along a bumpy road at a velocity v. the contour of the road can be approximated by
the populatoin p of a small community on the outskirts of a city grows rapidly over a 20-year periodt 0 5 10 15 20p 100
a piston-cylinder device contains 0.15kg of air initially at 2mpa and 350oc. the air is first expanded isothermally to
a 100 pound ball is suspended from a wall by a rope that is pulled asided by a horizontal rope B and held so that rope A makes a angle of 30 degrees with the vertical wall. Find the tension in ropes A and B?
liquid water is cooled at a constant pressure of 200 kpa in a piston-cylinder device from a temperature of 110 degc to
Determine (a) the horizontal line along which the shearing stress is a maximum, (b) the constant k in the following expression for the maximum shearing stress.
an ice chest is constructed of styrofoam k 0.033 wm?c with inside dimensions of 25 by 40 by 100 cm. the wall thickness
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