ELTR 2110 Analogue Communications: Module 1 Practice Test 1. A technique for resolving complex repetitive waveforms into sine or cosine waves and a dc component is known as: a) Harmonic Analysis b) Armstrong’s Principle c) Fourier Analysis d) Frequency Analysis Answer: c 2. The statement "information is proportional to bandwidth" is known as: a) Simpson Rule b) Shannon’s Law. c) Fourier’s Law. d) Hartley’s Law Answer: d 3. Given that a
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2150) Thermodynamics (MEEM 2200) Differential Equations (MA3521) MEEM 3700 Lecture 1-Introduction 4 2 Our heart beat‚ our lungs oscillate‚ we hear because our ear drum vibrates… Vibration even makes us snore!! The light waves which permit us to see & sound waves through which we hear entail vibration We cannot even say “Vibration” without vibration of larynges‚ vocal cord We move by oscillating our legs We limit out discussion to “MECHANICAL VIBRATION”… i.e. Vibration of Dynamic Systems
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Stock Market Model (Sine Curve) Sine curve is a technique used in everyday life. Whether it be from sound waves‚ to electrical curves‚ or light waves‚ sine curve is all around us. One place that is hugely affected by sine curve is the STOCK MARKET. The stock market is where “ publicly held companies are issued or traded through either exchanged or over-the-counter market”(investopedia.com). The purpose of using sine curve is to show whether or not the market is a cycle mode or a trend mode
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It was on this hot‚ cloudy day when I met a boy named Bryan who was down in Jamaica for vacation just like me. We both had a lot of things in common and became friends real quick. After playing around the beach for a few hours we both got really bored‚ so we decided to go on a little adventure out at sea. He brought with him a blow up raft that three people can fit on that can float out in the ocean. So we started pumping air into the raft and then put it out to sea with both of us on it. We wanted
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P1a 1.1 Thermal Radiation * Thermal or heat radiation is the transfer of energy by infra-red waves. * Thermal radiation is energy transfer by electromagnetic waves. * All objects emit thermal radiation. * The hotter an object‚ the more thermal radiation it emits. * Heat radiation can travel through a vacuum. 1.2 Surfaces and Radiation * Dark‚ matt surfaces are better emitters of thermal radiation than light‚ shiny surfaces. * Dark‚ matt surfaces
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in the end the impact of automation is great on our culture and lifestyles if we didn’t have them we wouldn’t function. • saves time • more efficant in cost • It is able to provid more and able to sell more The use of automation in the wave of the future‚ there is no denying it or fighting it. For every development there are downfalls of course‚ the increasing laziness and narcissism is a major downfall of our increased availability of technology. For example‚ nobody cares that you had
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BASIC IDEAS FOR FINAL YEAR PROJECT SELEC TION FOR ELECTRICAL & ELECTRONICS STUDENTS Project works are totally new to most of the engineering aspirants’ and is a blank slate to start with. It is an amorphous and a blank image to the students as they were earlier used to theory courses with prescribed text books and lab works that need to be carried out in the laboratory. A Project work is fortitude of common goal and group approach. Each passing year the engineering scholars are assigned project
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piezoelectric crystal energy source is that of creating a small motor; such as that used in a reflex camera to operate the auto focus system. These motors operate by vibration. The two surfaces are forced to vibrate at a phase shift of 90 degrees by a sine wave that has been generated at the motors resonant frequency. This forces a frictional force where the two surfaces meet and as one of the surfaces is fixed the other is forced to move. It has been found that piezoelectric crystals that have been embedded
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What exactly is the electromagnetic spectrum? Is a continuous range of wavelengths‚ which includes gamma rays‚ ultraviolet waves and other forms of electromagnetic radiation. How does the issue of scarcity and interference relate to the electromagnetic spectrum? The spectrum is considered scarce because of the limited number of frequencies for operation and two parties cannot broadcast on the same frequency in the spectrum. Interference not only can be caused by broadcasters but by natural phenomenons
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3 x 108 m/s. 6. The frequency of a signal is equal to the reciprocal of the signal’s period (f = 1/p). For a computer with a 2.4 GHz clock‚ what is the clock period? Use metric notation for your answer. 7. The signal shown below is a sine wave as it might be displayed on an oscilloscope. If it takes 40 msec. for the waveform to travel between the points shown by the arrow “B” below‚ what is the frequency of the waveform? 8. Power (in watts) is a certain amount of energy (in joules)
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