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A thin 20-cm X 20-cm flat plate is pulled at 1 m/s horizontally through a 3.6-mm-thick oil layer sandwiched between two plates, one stationary and the other moving at a constant velocity of 0.3 m/s, as shown in Fig. P2-45. The dynamicviscosity of oil is 0.027 Pa . s. Assuming the velocity in each oil layer to vary linearly,
(a) plot the velocity profile and find the location where the oil velocity is zero and
(b) determine the force that needs to be applied on the plate to maintain this motion.
The extreme radii of rotation of the balls are 70 mm and 105 mm. The distance of the fulcrum of each bell-crank lever is 75 mm from the axis of rotation of the governor. The minimum equilibrium speed is 420 rpm and the maximum equilibrium speed is..
it takes 15 seconds to raise a 1200 kg car and the supporting 300 kg hydraulic lift platform to a height of 2.8 m. the
A 10 kg metal block initially at 200 degrees Celsius and 1 MPa is heated to 500 degrees Celsius and 100 MPa. The metal block has a density of 2000kg/m^3 and a specific heat of 2kJ/kg*K. Calculate the change in the total internal energy and enthalpy o..
A new motorcycle is being developed to meet new gas mileage standards recently passed by the federal government. An engineer tested three model designs by randomly assigning the motorcycles in a blind study (the riders recorded the mileage but did no..
a rigid tank 0.4 m3 contains air at 400 kpa and 30c and is connected by a valve to a piston-cylinder device with zero
determine the amount of heat necessary to raise the temperature of 1 kg of aluminum from 30oc to 100oc.
air enters an insulated compressor operating at steady state at 1.05 bar 23 degrees c with a mass flow rate of 1.8 kgs
Refrigerant 134a flows at steady state through a horizontal tube having an inside diameter of .05 m. The refrigerant enters the tube with a quality of .1, temperature of 36 C, and velocity of 10 m/s. The refrigerant exits the tube at 9 bar as a satur..
what would be the final temperature of an average natural gas at 320of when the pressure is dropped from 3000 to 1800
while water condensate and vapor-X are removed by means not shown in the sketch. At a pressure of 1 bar, fluid-X has a saturation temperature and a latent heat of vaporization of Tsat = 80°C and hfg = 700,000 J/kg, pressure p for the steam, assu..
Describe several Web 2.0 technologies. Which technologies have you personally used before? Describe your experiences with several Web 2.0 technologies. What did you like about them? What did you dislike about them?
show how did you do the maintenance during your workshop machines were sent to your workshop from a big
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