9. A concrete highway is built of slabs 14 m long (20Cº). How wide should the expansion cracks be (at 20Cº) between the slabs to prevent buckling if the temperature range is -30Cº to +50Cº? I know I use the formula: L = LoT L = ? (Change in length of the slabs. We are solving for this.) = 12e-6 (Coefficient of expansion. I looked it up on page 388.) Lo = 14 m (Initial length of slabs.) T = 30 Cº (50Cº - 20Cº) (Change in temperaure. You only care about the hottest number
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Thermodynamics of a laptop computer Electronic computers currently have many orders of magnitude more thermodynamic process of freedom than information-bearing ones (bits).Because of this‚ these levels of description are usually considered separately as hardware and software‚ but as devices approach fundamental physical limits these will become comparable and must be understood together. Using some simple test problems‚ I explore the connection between the information in a laptop computer and
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Awesomov Entropy is a measure of the unavailable energy in a closed thermodynamic system that is also usually considered to be a measure of the system ’s disorder‚ that is a property of the system ’s state‚ and that varies directly with any reversible change in heat in the system and inversely with the temperature of the system (Webster). Entropy is a fundamental aspect of not only physics and its relation to thermodynamics‚ but also to biology and cognition (Ben-Naim). As it’s used in Isaac Asimov’s
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CHEMICAL LABORATORY EXPERIMENTS FOR (EP 205/EG207) LABORATORY MANUAL Lecturer/Instructor: Name: Student ID: Course: FACULTY OF ENGINEERING‚ ARCHITECTURE & BUILT ENVIRONMENT UCSI UNIVERSITY 2013 TABLE OF CONTENT General Instructions Experiment 1 Experiment 2 Experiment 3 Experiment 4 Experiment 5 Experiment 6 Isentropic Expansion Process Brief Depressurization The Fundamental Pressure-Temperature Relationship of Saturated Steam in Equilibrium Determination of Ratio of Volume Determination
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Lesson1- Laws of Thermodynamics Annette Tyler Laws of Thermodynamics Thermodynamics is the study of energy‚ the conversion of energy to various forms and the ability of energy to do work. The term ‘Thermodynamics’ originate from two root words ‘thermo’ which means heat and ‘dynamic’ which means power. The laws of thermodynamics are absolute and the observable universe obeys the Laws of Thermodynamics. The First Law of Thermodynamics is commonly known as the Law of Conservation of Matter
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COMSATS – LANCASTER (Dual Degree Program) EEE-112 Engineering Mechanics and Thermodynamics Assignment # 1 Submission date: Mon‚ Sep 17‚ 2012 1. A certain fluid at 10 bar is contained in a cylinder behind a piston‚ the initial volume being 0.05 m3. Calculate the work done by the fluid when it expands reversibly: a. at constant pressure to a final volume of 0.2 m3; b. according to a linear law to a final volume of 0.2 m3 and a final pressure of 2 bar; c. according to
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device has a resistance R0 = 100 Ω at 0o C. If the resistance RT = 197.7 Ω in an oil bath‚ what is the temperature of the oil in the bath‚ given that RT = R0(1+αT)? Take R0 = 100 Ω R0 = resistance at 0o C α = 3.9083 x 10-3 /o C (2 marks) NDE Thermodynamics and Heat Transfer Exam 2008 Name: _______________________________________ Read all the instructions before starting Do not open this paper until instructed Time allowed: 2 hours (plus 5 minutes reading time) Attempt ALL question in Section A
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Corollary 1: The clausius statement of second law of thermodynamics is the first corollary i.e. ‘It is impossible to construct a device operating in a closed cycle that performs no effect other than the transfer of heat from a cooler body to a hotter body.’ The mathematical statement of which is given by; Q1‐Q2=W Q1 W Q2 Corollary 2: It is impossible to construct an engine operating between only two heat reservoirs‚ which will have a higher efficiency than a reversible heat engine operating between
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Introduction: In industry‚ a heat exchanger is used to cool down streams for temperature sensitive processes. The now hot cooling water is useless to the plant unless something is done to cool it down. In industry‚ cooling water towers are used to bring the water back down to a sufficient level . In a cooling tower‚ outside atmospheric air is flowed through a “column” while the hot water sprayed into the system. Since air is never at full saturation of water (unless it is raining)‚ some of the hot
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