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Physicists have determined the theoretical value of the thermal conductivity of a carbon nanotube to be kcn,T = 5000 W/m · K.
(a) Assuming the actual thermal conductivity of the carbon nanotube is the same as its theoretical value, find the thermal contact resistance, Rt,c, that exists between the carbon nanotube and the top surfaces of the heated and sensing islands in Example 3.4 .
(b) Using the value of the thermal contact resistance calculated in part (a), plot the fraction of the total resistance between the heated and sensing islands that is due to the thermal contact resistances for island separation distances of 5 µ,m s 20 µ,m.
evaluate the various methods of how safety is measured and the current safety data systems and compare and contrast
refrigerant 134-a enters a condenser of a residential heat pump at 800 kpa and 35oc at a rate of 0.018 kgs amd leaves
The apparent viscosity of human blood has been reported as 6.49 cP at a shear rate of 10 s^-1, and 4.66 cP at a shear rate of 80 s^-1. Assuming that blood is a non – Newtonian fluid, estimate the volumetric flow through a capillary of diameter 1 mm w..
A shell-and-tube heat exchanger is used to cool a flow of steam using a stream of cooling water. The steam enters the heat exchanger at 0.1 bar and a quality of 91% (state 1), and exits as a saturated liquid at the same pressure (state 2). The mass f..
A motor has a disk mounted on its shaft. The disk has a diameter of 1 foot and weighs 60 pounds. Starting from rest, the motor rotates at 350 rpm after 5 seconds. If the motor has a 92% efficiency, determine the input power in watts.
a 4-lb ball b is traveling around in a circle of radius r1 3 ft with a speed vb1 6 fts. if the attached cord is
Identify and understand each phase of the product development process: The assignment includes the practical application of the first few phases of a PD process.
an ideal vapor-compression heat pump cycle with refrigerant 134a as the working fluid provides heating at a rate of 15
Ten pounds-mass of R-22 is at an initial volume of 4.059 ft3 and pressure of 200 psia. It is compressed isobaric ally until its volume is two-thirds of its initial volume. The piston is then held in place as the refrigerant cools until its temperatur..
Reheat, where high pressure and low pressure turbines are used, is added to a simple steam cycle to increase the steam quality at the location where the steam exits the low pressure turbine and goes to the condenser. Consider a steam cycle where the ..
determine the minimum mass in kg of a 24 in long tension member that must support a load of 1000 lbs manufactured from
the density and associated percent crysallinity for two nylon 66 materials are shown as follows compute the desities of
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