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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.
when do the cell get alot of thing in there thing because am confuse cause is alot of thing becaus is crazy
Give the properties and applications of Bakelite. This is most common type of phenol formaldehyde. This is hard, thermosetting, dark coloured material. Its major properties
INTRODUCTION : You have studied about chemical hazards in Unit 13 of Block-3 and would have learnt that many chemicals are hazardous. A good practice is to exercise caution in han
Which one of the following statements is correct? You may wish to examine a molecular model of this compound. 1. Carbon D is an asymmetric center and its configuration is R 2
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in the combustion of heptane in oxygen CO2 was produced.if 500kg of dry ice was produced of which 50% of the CO2 was converted to dry ice,what is the amount of heptane needed to bu
Q1 What is wrong with each of the following attempts to write an electron configuration? Justify your answer with suitable explanation. (a) 1s22s3 (b) 1s22s22p23s2 (c) 1s22s23s2 (d
Zinc has hcp structure. In a unit cell of zinc, the zinc atoms occupy 74% of volume of unit cell.
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Consider a heat-exchanger control loop with no dead time. It is controlled by a PD controller. The rate time is 0.25 min. A real PD controller is used with filtering where a = 0
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