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A well insulated 3-m X 4-m X 6-m room initially at 7 degrees C is heated by the radiator of a steam heating system. The radiator has a volume of 15 L and is filled with superheated vapor at 200 kPa and 200 degrees C. At this moment both the inlet and the exit valves to the radiator are closed. A 120-W fan is used to distribute the air to the room. The pressure of the steam is observed to drop to 100 kPa after 45 min as a result of heat transfer to the room. Assuming constant specific heats for air at room temperature, determine the average temperature of air in 45 min. Assume the air pressure in the room remains constant at 100 kPa.
a first-order system with a time constant equal to 10 ms is subjected to a sinusoidal forcing with an input amplitude
A particle traveled in a straight line in such a way that its distance (S) from a given point on that line after time (t) was S= 20t^3 -t^4 The rate of change of acceleration at time t=2 is what value?
Water is boiled at sea level (1 atm pressure) in a pan placed on top of a 2-kW electric burner that transfers 60% of the heat generated to the water. Determine the rate of evaporation of water in kg/s.
a high-strength cast-iron bar 8 in. in diameter is being turned on a lathe at a depth of cut d0.050 in. the lathe is
calculate the force required in direct extrusion of 1100-o aluminum from a diameternbspof 6 in. to 2 in. assume that
suppose that two plates thickness t0.027 m and area a1.2 m2 for each plate are mated together. the thermal conductivity
a 4.0 m3 rigid tank contains 3.7 kg of superheated water vapor initially at .20mpa . an electric radiator heating
in a processing plant cold water at 3degc is pumped through a 20 mm outside diameter galvanized steel pipe. the pipe
a rigid vessel contains 10 kg of steam. the steam is initially at 10 bar and 300degc. after a period of time the
a passenger car the aston martin one-shy77 is equipped with a 7.312l v12 naturally-shyaspirated 4-shystroke
the inner and outer surface temperatures of a glass window 5 mm thick are 15degc and 5degc. what is the heat loss
Derive equation for pressure to push pig through pipe line. A 20" diameter pipe is 7243 meters long and is being cleaned by a pig apparatus. Derive an equation for the required pressure given by a compressor to push a pig through a pipe while it push..
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