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A thin 30 cm x 30 cm flat plate is pulled at 3 m/s horizontally through a 3.6 mm think oil layer sandwiched between two plates, one stationary and the other moving at a constant velocity of 0.3 m/s in the opposite direction. The dynamic viscosity of the oil is 0.0027 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 play to maintain this motion. the plate is 1 mm from the stationary wall and 2.6 mm from the moving wall.
a household refrigerator that has a power input of 80w assume constant work input over time and a coefficient of
on a cold winters day it is 30degf outside. yet the temperature of the outside surface of the mechanical engineering
air at 80 degrees fahrenheit and 80 percent relative humidity is cooled to 51 degrees fahrenheit at a constant pressure
air at 10 deg c and 80 kpa enters the diffuser of a jet engine steadily with a velocity of 200 ms. the inlet area of
what is the reason for the change in enthalpy between the throttle valve and the evaporator in a practical refrigeration cycle that is using R12 refrigerant.
a ferromagnetic material has a remanence of 1.0 tesla and a coercivity of 15000 am. saturation is achieved at a
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?
water at a temperature of 40 c and a pressure of 100 kpa enters a pump at the rate of 50000 kghr. the water leaves the
consider a cold canned drink left on a dinner table. would you model the heat transfer to the drink as one two or three
A power plant operates a regenerative Rankine cycle with a reheat, one closed and one open feedwater heater and has a net power output of 1.2 x 109 Btu/hr.
The weight W causes a tension of 100lb in cable CD. If d= 2ft, what is the momentum about the z axis due to the force exerted by the cable CD at point C?
a stone is dropped into a lake causing circular waves whos radii increase at a contant rate of .5 m/s at what rate is the circumference of a wave changing when its radius is 4 meters?
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