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Techniques of Waste Heat Recovery Waste heat recovery is being more used more and more often today as it is becoming more effective‚ due to increasing energy prices‚ technological developments and a decrease in equipment costs. Heat recovery can be classified into three main strategies: recycling energy back into the process‚ recovering the energy for other onsite use and using it to generate electricity in combined heat and power systems. Once the system has been made as efficient as possible before
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The X-Ray imaging system has one function‚ and that is to provide a constant flow of electrons that are strong enough to produce and x-ray beam to create an image. There are many different sizes and types of imaging systems but no matter what system you use‚ every type will have three main sections. Those sections are the control console‚ the high voltage generator and the x-ray tube. The x-ray tube is located in the exam room‚ the control console is located in an adjoining room that is separated
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2013 & 2014 related to following chapters. i. Banking ii. Compound interest iii. Matrices iv. Trigonometrical Identities v. Heights and Distances Physics:- 1. Solve last 10 years question papers for chapter 11 (Calorimetric)‚ Chap 12(Thermionic Emission and Radioactivity). 2. Complete project work for 1st term and 2nd term. First term:- Draw ray diagram for the following:- a) Refraction through a glass slab. b) Refraction through a glass prism. c) Dispersion of white light
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PHYS 101-2 STUDY GUIDE 1. The study of stationary or resting charges. ____________________________ 2. ________________________ is a connection made to Earth. 3. ________________________ is the process by which electrons are added or removed from a body. 4. List the three modes of electrification. __________________________________________________________________________________________________________________________________________________________________________________________
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Thermionic valves which were once used in computers‚ radios‚ and TVs were replaced by transistors. Compared to thermionic valves transistors: ~Had much smaller sizes (miniaturization) ~Much cheaper and more reliable ~Used less power When transistors were first developed they were about 0.5 cm3 in volume It was found that transistors could also be miniaturized by using silicon doped with arsenic/gallium. Several million transistors could now be placed on area of 1cm3. This had enormous consequences
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are proposing is a metal/semiconductor nanocomposite that will allow us to modify four intrinsic material properties in order to fabricate more efficient thermoelectric systems. The concept of a metal/semiconductor nanocomposite as a solid-state thermionic material represents a radical alternative to conventional homogeneous thermoelectric materials. Instead of focusing on semiconducting materials with a highly asymmetric density of states about the Fermi level yielding an optimal doping level of
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1 Model Question Paper Basic Engineering and Sciences The material in which spontaneous polarization changes with temperature is known as (1) Piezo electric (2) Ferro electric (3) Pyro electric (4) Magneto optic Where K and s are thermal and electrical conductivities in a solid‚ according to Wiedemann Franz law 1. The theorem used for equilibrium of concurrent 8. coplanar forces is (1) Varignon’s Theorem (2) Lame’s Theorem (3) Parallel Axis Theorem
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which the patient’s teeth are closed. Cathode- a negative electrode form which electrons are emitted. In x-ray tubes‚ the cathode usually consist of a helical tungsten filament behind which molybdenum reflector cup is located to focus the electron emission toward the target of the anode. Central Beam- The theatrical center of the x-ray beam. The term is used to designate the direction of the x rays in a given projection; the central ray may be considered to extend from the focal spot of the x-ray
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3.1 CATHODE RAYS 3.1.1 Explain that cathode ray tubes allowed the manipulation of a stream of charged particles. DEFINITTIONS: * Cathode Ray Tube: is an evacuated tube which allows the unobstructed movement of cathode rays from a cathode to an anode. * Cathode Ray: Are negatively charged particles and can therefore be deflected. * This can be shown by 3 facts: * They leave –ve charge on the surfaces they strike * They are deflected by magnetic fields as predicted
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