concepts involved in the applications of materials in Engineering and Technology. Unit 1 Conducting material 10 hours (Description) Drude – Lorentz Classical free electron theory of metals –electrical conductivity – relaxation time – drift velocity –Matthiessen’s rule – thermal conductivity – Wiedemann –Franz law- drawbacks of classical theory; Kronig-Penny Model‚ Quantum theory (derivation) and its success – Band theory of solids. Unit 2 Semiconductor materials 15 hours (Description)
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material is characterized by self-adaptability‚ self sensing memory and decision making. Smart materials are the materials that respond with shape or other property change upon application of externally applied driving forces (electrical‚ magnetic and thermal). In other words‚ smart materials refer to materials that can
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Physical and Mechanical Properties * Density * About the same as carbon steel * Conductivity * Poor conductors of both heat and electricity * Thermal conductivity of stainless is about half of carbon steel * Electrical resistivity of stainless steel can be as much as 6 times as much as carbon * Expansion * Austenitic (300 series): coefficient of thermal expansion is up to 50% greater than carbon steel * Modulus of elasticity * Slightly
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Homeostasis - Thermoregulation Homeostasis is the ability of a cell or organism to maintain a stable internal environment despite fluctuating external environmental conditions. An animal will maintain this state of equilibrium through adjustment mechanisms that keep the conditions of its cells and body within a narrow range (SOC 2 n.d.). Homeostasis is crucial to the survival of an organism‚ by maintaining a stable environment‚ it enables cells to be functioning optimally‚ giving an organism the
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Determination of specific heat Capacity of a solid by electrical method Introduction Thermal conductivity heat is transferred as a consequence of temperature difference between 2 bodies‚ heat energy passes form a hotter to the colder body. Specific heat capacity is the amount of heat energy required in joules to raise 1kg of a substance by 1 degree Celsius‚ different substances absorb heat energy at different rates not all substances require the same amount of heat energy to increase the
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metal and located in the eleven’s column and on the fourth period in periodic table. It has 4 shells and in the valence shell there are 11 electrons. Copper has 1 s orbital electron and full d-orbital‚ which explains the ability being ductile and conductivity. According to physical properties‚ copper is reddish brown metal. It has very high melting and boiling points‚ which are 1083⁰C and 2595⁰C. The density of metal is 8.96 g·cm−3. Besides‚ copper is stable to corrosion and fully recyclable. Recycling
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ADSORPTION AND ABSORPTION OF EXHAUST GASES FROM VEHICLES Rinkesh.A.Bafna‚ Kushal.A.Khanderia‚ Asst.Prof. N.Anandakumar Abstract— As India is developing in a faster rate the need for vehicles has tremendously increased. In this scenario‚ we strongly need an efficient way to control the increasing air pollution led by the exhaust gases from the vehicles. These exhaust gases contains carbon monoxide (CO) and hydrocarbons in high proportions which adversely increases the Global Warming and
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sulfate decahydrate is inserted. The water purification system consists of a Culligan® Reverse Osmosis apparatus and an UltraPure SMEF Multiple-Effect Distiller. This system has a maximum capacity of 4‚000 gallons/day and can maintain a water conductivity level of ≤ 5 µS/cm. The design consists of 40 feet of piping‚ 6 elbows‚ 2 T ’s‚ 6 two-way plug valves‚ and 5 three-way plug valves‚ 2 storage tanks‚ and 2 mixing vessels. This equipment is all made from passivated 316L SS to increase corrosion
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conditions than conventional water vapour permeability tests. The temperatures of the measuring unit and thermal guard ring are controlled 35°C to mimic the temperature of the skin‚ and the test specimen is laid over the measuring unit and thermal guard ring to overlap the thermal
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Question 1(10 marks) Comment the following statements (a) The volume coefficient of thermal expansion of water is negative for temperatures in the range 0 to 4 °C. (b) The triple point of water‚ 0.01 °C‚ and 611.73 Pa‚ is one of the primary fixed points on the Kelvin absolute temperature scale. (c) The volume coefficient for the thermal expansion of a solid is twice the linear coefficient for thermal expansion. (d) A temperature of 26.85 °C is the same as 300 K. (e) The surface temperature
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