Heat & Mass Lab 1: | | | 2/10/2011 2/10/2011 Executive Summary This experiment was conducted using a heat transfer unit. Many relationships were obtained and calculated from the observed results. To name a few; the log mean temperature difference‚ heat transfer coefficient‚ Reynolds‚ Nusselt and Graetz numbers. The main focus of this experiment is the heating and cooling of the oil fluid. This was achieved using the heating component in the heat exchanger and water flowing
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Introduction The "Building Envelope" is the area that separates conditioned space from unconditioned space or the outdoors. A building envelope includes all elements of a building that enclose conditioned space. Building envelope components separate conditioned spaces from unconditioned spaces or from outside air. For example‚ walls and doors between living areas are part of the building envelope; walls separating a garage from the living areas are not. Besides that‚ floors of conditioned basements
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GRAPHENE: Nano Material with Macro Potential Abstract With the advent of technological advances in searching new and efficient sources of energy‚ Graphene has been touted to be the next big thing in the areas of energy storage and conversion. Being 200 times more stronger than steel and having current density million times greater than copper (at room temperature)‚ or its intrinsic mobility is a hundred times greater than that of Silicon‚ or its specific area being 2630 (m2/g)
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of the law originally formulated by Ohm. The simplest example of this is: where J is the current density at a given location in a resistive material‚ E is the electric field at that location‚ and σ is a material dependent parameter called the conductivity. This reformulation of Ohm’s law is due to Gustav Kirchhoff. MICROSCOPIC ORIGINS OF OHM’S LAW The dependence of the current density on the applied electric field is essentially quantum mechanical in nature;A qualitative description leading to
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Dental amalgam Sandra Bērziņa Definitions Amalgam: alloy of mercury with one or more other metals Amalgam alloy: alloy which combines with mercury to form amalgam Dental amalgam alloy: alloy that is combined with mercury to form amalgam used for dental purposes Dental amalgam • Dental amalgam has been the most widely used material for the restoration of posterior teeth due to: – High strength and durability – Ease of use – Good physical characteristics • However‚ its use
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3 Question 1 (Marks: 20) On a straight‚ flat section of road‚ a car follows a truck. Initially (t < 0)‚ both are travelling at speed v0 = 90 k.p.h. The truck maintains constant speed throughout. The car is initially 2.0 seconds behind the truck‚ i.e. for t < 0 the car
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Summary The topic investigated in this report is heat transfer in a concentric tube heat exchanger. A heat exchanger is a device used to transfer heat from a hot fluid to a colder fluid. Heat exchangers are widely used in the petroleum industry for various reasons. Some of the most important reasons are theta heat exchangers increase the process efficiency‚ conserve energy‚ reduce maintenance and provide employee safety among many other reasons. The main objectives of the lab study were to determine
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STPM/S(E)960 PEPERIKSAAN SIJIL TINGGI PERSEKOLAHAN MALAYSIA (MALAYSIA HIGHER SCHOOL CERTIFICATE) PHYSICS Syllabus Second Edition This syllabus applies for the 1999 examination and thereafter until further notice. However the form of examination for Physics stated in this booklet was first implemented in the 2001 examination as announced through a circular‚ Pemberitahuan MPM/2(AM)/2000. Teachers/candidates are to advised to contact Majlis Peperiksaan Malaysia for the latest information about the
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Silicon Element Silicon is a chemical element with the symbol Si and atomic number 14 and atomic mass is 28. It is a tetravalent metalloid‚ less reactive than its chemical analog carbon‚ the nonmetal directly above it in the periodic table‚ but more reactive than germanium‚ the metalloid directly below it in the table. Controversy about silicon’s character dates to its discovery; it was first prepared and characterized in pure form in 1823. In 1808‚ it was given the name silicium‚ with an -ium
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Engineering Materials Msc. Shaymaa Mahmood Introduction to Eng. Materials : Since the earliest days of the evolution of mankind ‚ the main distinguishing features between human begins and other mammals has been the ability to use and develop materials to satisfy our human requirements. Nowadays we use many types of materials‚ fashioned in many different ways‚ to satisfy our requirements for housing‚ heating‚ furniture‚ clothes‚ transportation‚ entertainment‚ medical care‚ defense and all the
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