situation for thick pipes is‚ however‚ more complex. [pic] The figure shown above represents the condition in a thick walled pipe. The area for heat flow is proportional to the radius – as may be seen‚ the area at the outside wall of the pipe is much greater than the middle. As a result the temperature gradient is inversely proportional to the radius. The heat flow ‘per unit length of pipe’ at any radius r‚ is [pic] cf. [pic] Note: Area‚[pic] Note there is no length of pipe (l) in this equation
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experiment aimed to determine the specific heat of two different metals‚ Lead and Zinc‚ in order to calculate their individual atomic weight. Theory The calorimeter consists of a metal outer cup‚ a removable metal inner cup‚ which is held in place by a rubber ring‚ and an insulating lid with a small opening for a thermometer. It is a closed system as the air between the inner cup and outer cup insulates the water and heated metal‚ so‚ ideally‚ all heat is contained within the calorimeter (1). Early
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Haier – Taking a Chinese Company Global in 2011 Haier is a Chinese consumer electronics company with its headquarters in Quingdao‚ Shandong‚ China. They were once the largest home appliance maker in China and started their business in the year 1984. In 2010‚ they were called one of the most innovative firms of the Business Weeks magazine. Their products are air conditioners‚ mobile phones‚ washing machines‚ refrigerators and televisions. The CEO of Haier‚ Zhang Ruimin‚ wanted to create
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When compared to water pollution‚ air pollution tends to take a backseat. While each issue is equally important‚ it’s easy to forget the prevalence of air pollution. After all‚ unless you live in a city‚ the air above your head probably looks as healthy as ever. And one doesn’t go jumping into dirty air the same way you might in a dirty ocean or lake‚ so the issue of air pollution might not resonate as much. Unfortunately‚ air pollution is still a prevalent issue‚ whether you live in a city with
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Prova Aquest documetn serveix per activar el compte‚ en quan tingui mes informacio de com funciona pujare el documente que s’em requereixi. Haier had been founded as Qingdao Refrigerator Co. in 1984. With China opening up to world markets‚ foreign corporations began searching for partnerships in China. One of these‚ Germany’s refrigerator company Liebherr entered into a joint-venture contract with Qingdao Refrigerator Co.‚ offering technology and equipment to its Chinese counterpart. Refrigerators
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If Thermos lunch box is the best thermal insulator then food in it should maintain its original temperature longer than the other two lunch box types. Identify Dependent Variable: Lunch box type. Independent Variable: The losing and gaining of heat. Variables Attempting to Control: Environmental temperature‚ The temperatures of food and thermal insulators. proposed experiments Materials [Where to get]: * Zeomic lunch box [Canadian Tire] * Thermos lunch box [Walmart] * California
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Brandy Corporation Research Memo Facts Brandy Corporation agreed to purchase a new air conditioning unit for its office building on December 27‚ 2006‚ for $300‚000. Unfortunately‚ the unit was not installed until October 21‚ 2007 because of multiple delays throughout the shipping process. On March 28‚ 2008‚ Brandy Corporation first used its new air conditioning unit. Issues 1. What year should Brandy Corporation recognize the air conditioning unit was first put into service? 2. How much
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Solutions to Problems (Übungen) to Lecture-1 of Lecture Series “Heat Transfer – 1” Institut für Energieverfahrenstechnik und Brennstofftechnik‚ TU Clausthal‚ SS 2005 1.1 A heat rate of 5 kW is conducted through a cross section area of 20 m2 and thickness of 3 cm. If the inner (hot) surface temperature is 600ºC and the thermal conductivity of the material is 0.5 W/mK‚ what is the outer surface temperature? Solution: Tout = 585 °C 1.2 The heat flux through a wood slab 50 mm thick‚ whose inner and outer
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In this experiment‚ the Independent Variable was the heat lamp‚ and the dependent variable was the temperature of the soil‚ because the temperature varied based on whether the heat lamp was turned off or on‚ and whether there was extra water added or not. Our hypothesis was proven correct‚ because the dry soil’s temperature was hotter than the damp soil’s temperature when the heat lamp was on‚ but then it decreased when it turned off‚ while the damp soil’s temperature remained the same. This is because
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Technology in Practice Part II: Intra-Aortic Balloon Pump Background of Technology Before tThe intra-aortic balloon pump (IABP) became a successful piece of technology‚ it was first introduced by Harken in 1958 in hopes of treating left heart failure (IABPumpers‚ 2006). Harken thought that by removing a certain amount of blood from both femoral arteries during systole‚ and rapidly replacing it during diastole‚ he could augment the cardiac output and increase coronary perfusion. However
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