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Two parallel planes 1.2x1.2 are splited by a distance of 1.2 m. the emissivity's of the planes are 0.4 and 0.6, and the temperature are 760 and 300 oC, correspondingly. A 1.2x1.2 radiation shield having an emissivity of 0.05 on both side situated equidistance among the two planes. The combined arrangement is placed in a large room which is maintained at 40 oC. (a) Determine heat transfer rate from each of the two planes if the shield were not present. (b) Determine heat transfer rate from each of the two planes if the shield were present. (c) Temperature of the shield.
Contact Printing In contact printing, the resist-coated silicon wafer is bring into physical contact with the glass photo mask. The wafer is held on a vacuum chuck, and the ent
how Be2+ isoelectronic with li+
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Advantages of cold working (i) No heat is needed. (ii) Better surface finish is get. (iii) Superior dimension control. (iv) Improved strength and hardness properti
explain
the frame in figure consisted of members AB and BCD connected by pin at B, and member AB is a quarter circle of radius 75mm. the whole frame is supported by pins at A and C. for th
Steam at 400C, 100 bar in an insulated cylinder is rapidly decompressed to 10 bar, by unlocking the piston and permitting the gas to expand, with a constant external pressure of 10
what is the order of reaction of formox process for production of formaldehyde from methanol and what is the value of rate constant k.
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