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Heat treatment is common in processing semiconductor materials. A 200- mm-diameter silicon wafer with thickness of 725 ?m is being heat treated in a vacuum chamber by infrared heater. The surrounding walls of the chamber have a uniform temperature of 310 K. The infrared heater provides an incident radiation flux of 200k W/m2 on the upper surface of the wafer, and the emissivity and absorptivity of the wafer surface are 0.70. Using a pyrometer the lower surface temperature of the wafer is measured to be 1000 K. Assuming there is not radiation exchange between the lower surface of water and surroundings, determine the upper surface temperature of the wafer. Pyrometer is a non-contacting device that intercept and measures thermal radiation. The device is used to determine the temperature of an object's surface.
the dredger is loading a sand onto a barge.the sand leaves the dredger pipe at 4ft/s with a weight flux of 850 lbs/s. estimate the tension on the mooring line caused by this loading.
the final paper provides you with an opportunity to integrate and reflect on what you have learned during the class.the
A two capacity process tank is to be analyzed using proportional and integral controllers. A process could be a steam jacketed kettle as shown in Figure.1.Water is heated continuously by the steam flow and it is proposed to use a controller to regula..
water contained in a closed, rigid tank, initially saturated vapor at 200C, is cooled to 100C. determine the initial and final pressure, each in bar. locate the initial and final states on a sketches of the p-v and T-v digrams.
i want the same tutor who did my last assignment fluids mechanices
a disk has a mass of 4kg and a radius of 90mm it is at rest when it is placed in contact with the belt which moves with
Strategy formulation presupposes a set of objectives and goals.
block a and b weigh 100 lb and 60 lb respectively. if block a has a center of gravity at g as shown determine the
Steam enters a diffuser at and with a velocity of and exits as saturated vapor at 240 F and 100 ft/s. The exit area of the diffuser is 1 ft2. Determine the mass flow rate of steam and the rate of entropy generation.
a homogeneous cylinder with weight g and radius r lay on a roughnbsphorizontal floor and adjoins to a rough vertical
Couette Flow Velocity Distribution, Using the log law, determine the velocity distribution for Couette flow between parallel plates a distance h apart, with U = the velocity of the top plate.
fixed costfc 2000000 variable costvc 120.005q total costtc fc vc x q unit sales price p250nbspa determine the values
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