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1. Air at 25°C and 1 atm is in fully developed flow at m· = 10-3 kg/s through a 10-mm-diameter circular tube whose inner surface is wetted with water. Determine the tube length required for the water vapor in the air to reach 99% of saturation. The inlet air is dry.
2. A humidifier consists of a bundle of vertical tubes, each of 20-mm diameter, through which dry atmospheric air is in fully developed flow at 10-3 kg/s and 298 K. The inner tube surface is wetted with a water film. Determine the tube length required for the water vapor to reach 99% of saturation. What is the rate at which energy must be supplied to each tube to maintain its temperature at 298 K?
A tank at 60 degrees C saturated water and mass 2 kg. What is the amount of heat required to convert this into saturated water?
air at 100 o f and 14.7 psia has a dew point temperature of 70o f. determine the relative humidity and the humidity
a velocity field is given by v 2xyi x2j. find the accelaration dvdt and use the euler equation to find the pressure
Nan crystalline materials have grain sizes ranging from 0.01 to 0.1 microns. If the contribution of grain boundary strengthening in an alloy with grains of 0.1 microns is 20 MPa, what would you expect it to be if the grain size were reduced to 0.01 m..
A supply of steam at a pressure of 4 MPa and a temperature of 332°C (state 1) is used to do mechanical work as it expands to a pressure of 100 kPa and a quality of 90% (state 2). During the expansion process, 60 kJ/kg of heat is removed from the wate..
gaseous co2 is contained in a vertical piston-cylinder assembly by a piston of mass 50 kg and having a face area of
Hot water is provided to a house by an electric water heater which uses a 60L tank. The electric heater is rated for a 1.6kW. The hot water tank is completely full with water at 80°C when someone starts a shower. The shower faucet mixes cold water at..
An accident occurs when car A rear-ends car B at a stoplight. The mass of car A is 1500kg and the mass of car B is 1000 kg. Car B was initially at rest with the brakes locked. Skid marks indicate car B slid 12 m after the impact. Assuming that the co..
Determine the reactions on the beam at its support A in terms of the compression CA, shear VA, and bending moment MA.
The amount of heat (dh = 327.18 KJ) is added to an open volume of 1m3 of air (at standard sea level conditions), causing it to expand to 4 m3. How much work is done by the air? What is the internal energy of the gas after the expansion?
air at 27 c approaches a 0.91 m-long by 0.61 m-wide flat plate with an approach velocity of 4.57 ms. determine the
a particle has a position vector given by r 38t 46t - 4t2 where r is in meters and t is in seconds. find the
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