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Calculate the critical heat flux on a large horizontal surface for the following fluids at 1 atm: mercury, ethanol, and refrigerant R-134a. Compare these results to the critical heat flux for water at 1 atm.
hot air at 800c is blown over a 2-m x 4-m flat surface at 300c. if the average convection heat transfer coefficient is
Important information about Multipal choice question on mechanics, A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine?
suppose a pair of rolling element bearings is being considered as the support for the front wheel of a bicycle. the
a simple wheatstone bridge as shown in fig. 7.10 is used to determine accurately the value of an unknown resistance r1
an industrial water shutoff valve is designed to operate with 30lbs of force and will encounter 200lbs of resistance
If a person and a wheelchair have a mombined weight of 185 lb how much ideal effort force is required to travel up the ramp? Can you just explain to me what equation I need for this?
design a turbojet engine to flight at an altitude of 10000m. the pressure ratio across the compressor is 3. the
a small spherical ball is gently released from rest in a cylindrical tank completely filled with glycerine. the ball
Complete the sketch of the obtuse triangle. It must have an area of 1.75 in.2. Prove the geometry by dimensioning the sketch and showing the area calculation. Show only those dimensions needed for the area calculation. Note: each grid unit = .25 i..
on a cloudless day the sunlight that reaches the surface of the earth has an intensity of about 1.2 103 wm2. what is
consider a cylinder transistor diameter 0.4 cm and length 0.5 cm that dissipated 0.2w power onto 30c transistor1
If the beam has square cross section of 9 in., on each side, determine the absolute maximum bending stress in the beam.
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