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In air-conditioning systems, streams of cold and warm air are mixed to get air with the right temperature. Consider a mixing chamber into which cold air enters at 8 degree C and 100 kPa at a rate of 0.55 m3/s and warm air enters at 30 degree C and 100 kPa. The ratio of mass flow rates of warm to cold air streams is 1.6. Using variable specific heats, determine the mixture temperature leaving the mixing chamber
a closed tank having a volume of 2ft3 is filled with 0.30 lb of a gas. a pressure gage attached to the tank reads 12
mechanical vibrations a helical spring of stiffness k is cut into two halves and a mass m is connected to be 0.5 s. if
steam enters an adiabatic turbine at 3 mpa and 350 celsius and leaves the turbine at 75 kpa with a quality of 89. if
a plate 50 mm wide and 15 mm thick is loaded in tension. the plate is made from steel with yield strength of 1500 mpa
a block weighing 10 lbf and having dimensions 10 in. on each edge is pulled up an inclined surface on which there is a
The water is initially at room temperature (293 K). Water boils at 373 K. How much energy must be added to the water by heating it in order for it to start boiling?
if a coal-burning electrical generating plant burns 2 tons of coal to generate 6000 kwh of electricity calculate the
a carnot engine delivers 100 kw of power by operating between temperature reservoirs at 100degree c and 1000 degree c.
sludge is wet solids that result from the processing in municipal sewage systems. the sludge has to be dried before it
the position of a particle which moves along a straight line is defined by the relation x t3 - 6t2 - 15t - 40 where x
Sketch carefully T-s diagrams for Otto and Brayton cycles on the basis of a logarithmic scale for T and a linear scale for s. What are the slopes of the constant pressure heating processes (Brayton) and the constant volume heating processes (Otto) on..
One side of a copper block 5 cm thick is maintained at 250*C. The other side is covered with a layer of fiberglass 2.5 cm thick. the outside of the fiberglass is maintained at 35*C, & the total heat flow through the copper-fiberglass combination is 5..
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