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Air at 1.0 atmosphere pressure and 77 0C enters a 5.0 mm i.d. tube with a bulk average velocity of 2.5 m/s. the velocity profile is developed and the thermal profile is developing. The tube length is 1.0 m, and a constant heat flux is imposed by the tube surface on the air over the entire length. An exit air bulk average temperature, T b,o = 127 0C, is required. Determine the exit h, the uniform heat flux and the exit tube surface temperature.
a motorist enters a freeway at 36 kph and accelerates uniformly to 90 kph. from the odometer in the car the motorist
A household refrigerator with a coefficient of performance of 2.4 removes energy from the refrigerated space at a rate of 600 Btu/h. Evaluating electricity at , determine the cost of electricity n a month when the refrigerator operates for 360 hou..
the old rigid tank problem a tank has a volume of 600 gallons and holds 300 lbm of water at 40 psig pressure. what is
Energy in the home, personal energy use and home energy efficiency. Efficient use of ‘waste' heat and renewable heat sources.
a gaseous fuel has the following volumetric analysis 90 methane ch4 5.0 ethane c2h6 and 5nitrogen. it bums in a steam
a steel rod with a diameter of 2 cm length l25cm thermal conductivity of 50 wmk is exposed to ambient air at 20c. heat
determine the frequency response and m omega and phiv omega for an instrument having a time constant of 10 ms.
The car travels up the hill with a speed of v = (0.4s) m/s, where s is in meters, measured from A. Determine the magnitude of its acceleration when it is at point s = 50 m, where p = 500 m.
Cooling/Dehumidification of an air stream, A 1000 m3/minute air stream at atmospheric pressure is at a temperature of 82.2oC and a humidity of 60%. We want to cool the air + water vapor to 8.9oC to condense the water vapor.
packages are thrown down an incline at a with a velocitynbspof 1 ms. the packages slide along the surface abc to
consider an isentropic expansion process in a piston cylinder device where air is expanded from 1mpa and 800 k to 0.1
vector a has components ax 1.24 ay 2.21 vector b has components bx 4.06 b-y -3.66. find the counterclockwise angle
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