chapter 1 : Waves GCKL 2011 1.1 U N D E R S T A N D I N G W A V E S What is meant by a wavefront State the direction of propagation of waves in relation to wavefronts What is transverse wave? An imaginary line that joins all the points on the crest of a wave. The direction of propagation of a wave is perpendicular to its wavefront. A transverse wave is a wave in which particles of the medium oscillate in the direction of the propagation of the waves. Water waves and electromagnetic
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teaching skills and thought The Third Wave was disturbing normal learning in his class. It even crossed his mind that he” Should have I been teaching this technique all along?” just because of the positive response in the beginning. Mr. .Jones was extremely surprised by the student’s desire and response to fulfill his task. Students not only obeyed him‚ but not even questioned his demands. As the week went on more kids felt that they needed to be a part of The Third Wave. I’m also very surprised that
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Lectures Lectures of Heat Transfer Heat Transfer Rate Processes Mode Conduction Convection Radiation Transfer Mechanism Diffusion of energy due to random molecular motion Diffusion of energy due to random molecular motion plus bulk motion Energy transfer by electromagnetic waves Rate of heat transfer (W) q = - kA dT dx q = h A(Ts-T∞) q = σ ε A(Ts4-Tsur4) By Mr. Amjed Ahmed Ali Syllabus of Heat Transfer (English)‚ (2 hours/ week‚ Applied 2 hours /week) 1.Heat transfer by conduction
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HEAT TRANSFER MECHANISMS Heat energy is being transferred from one location to another because of a temperature difference. The three mechanisms for heat transfer are: • Conduction. When you grip the hot handle of a pan on a stove‚ you feel conduction in action. Heat flows from the pan and along the length of the handle to its cooler free end. This is because one end of the rod is held at the high temperature‚ and the other end stays at the lower temperature. Although the rod itself doesn’t
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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 the heat transfer rate‚ the
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Heat in physics is defined as energy in transit. It is symbolized with the alphabet Q. (Strong‚ Martin C. The Great Alternative and Indie Discography of Heat) It is mostly connected with different movements of atoms‚ molecules and other particles. These particles either consist of particles that are either hot or cold. High temperature bodies‚ are often caused due to the high heat transfer‚ which is created by chemical reactions‚ nuclear reactions‚ electromagnetic dissipation‚ or mechanical dissipation
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Rearranging gives Heat and Temperature Change: Specific Heat Capacity Q = mc T 4186 J = 1 kcal Ex: If 15 kcal of heat are added to 5.0 kg of silver‚ by how much will its temperature rise? Ex: An aluminum cup having a mass of 250.0 g is filled with 50.0 g of water. The initial temperature of the cup and water is 25.0 °C. A 75.0-g piece of iron initially at 350.0 °C is dropped into the water. What is the final equilibrium temperature of the system assuming that no heat is lost to the
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Name: Waqas Kampulvi Frequency & wave length Experiment Aim: The wavelength and frequency of light are very closely related‚ our aim for this experiment is to determine the relationship between wavelength and frequency and the impact or change in the numbers as a result. Apparatus: Loud Speaker Signal Generator Ruler Microphone Audio Analyzer Plastic Tube Supporting Research: All sound waves which are travelling through the air are in fact longitudinal waves (running lengthwise rather than
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Heat of Combustion Questions 1. When bonds are broken‚ energy is required. When bond are formed‚ energy is released. All combustion reactions are exothermic. Suggest a reason for this in terms of the bonds broken and bonds formed. The energy required to break the bonds is greater than the energy required to form. 2. Explain why the heat of combustion of alkanols increases as the length of the carbon chain increases. The heat of combustion of alkanol increases as the length of carbon chain
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Heat exchanger A heat exchanger is a device that is used to transfer thermal energy (enthalpy) between two or more fluids‚ between a solid surface and a fluid‚ or between solid particulates and a fluid‚ at different temperatures and in thermal contact. In heat exchangers‚ there are usually no external heat and work interactions. Typical applications involve heating or cooling of a fluid stream of concern and evaporation or condensation of single- or multicomponent fluid streams. In a few heat exchangers
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