Signal amplification circuit The ultrasonic signal which was received with the reception sensor is amplified by 1000 times(60dB) of voltage with the operational amplifier with two stages. It is 100 times at the first stage (40dB) and 10 times (20dB) at the next stage. As for the dB (decibel)‚ refer to "Logarithm Table". Generally‚ the positive and the negative power supply are used for the operational amplifier. The circuit this time works with the single power supply of +9 V. Therefore‚ for the
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1. How does Sunblock work? Sunscreen contains organic and and inorganic chemicals. The sun shines down UV Rays which are harmful to our skin. The organic chemicals in sunscreen absorb the UV Rays through their chemical bonds. As the bonds absorb UV radiation‚ the parts of the sunscreen slowly break down and release heat. The higher SPF a sunscreen is‚ the more it protects against the UV Rays the sun shines down. 2. How does detergent work? Detergents are made up of things called surfactants
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A123 Systems History of Lithium-Ion Batteries Rechargeable battery evolution accelerated as the world transitioned to instruments enabled by silicon microchip technology from those of bulky electrical components. Mobile devices were designed to be powered by lightweight energy storage systems. The development of batteries for this rapidly evolving market was challenging: • The nickel cadmium battery had been the only option for modern electronics for many years. It was a great improvement over
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Objectives: The objective of this assignment is to design and construct a car park digital controller circuit for 99 car parking slots using sequential and combinational logic circuits. The circuits will receive the digital signals from two sensors located at the ENTRANCE and EXIT of the car park to display the number of empty slots and to display the word FULL in case of no more empty slots. Introduction: We need to monitor the number of empty slots in the parking areas by setting up a sensor EN
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Domestic Environment Assignment 2 Julia Hopkins BUSN 310 The company that I have chosen to research is AK Steel. AK Steel was originally ARMCO and was founded in 1899. The company was formally renamed to AK Steel in 1993 when it was open publicly as a trade company. AK Steel produces‚ carbon‚ stainless steel‚ electrical steel‚ cold rolled‚ and aluminum coated stainless steel that is used in automobiles (AKSteel.com‚ 2015). Armco is best known for producing crash barriers that are
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chemical compounds and molecules by their size and charge. The substances being separated are placed in wells in an agarose gel and subjected to an electrical field. Negatively charged molecules move towards the positive anode‚ and positively charged molecules move towards the negative anode. Longer or larger molecules have difficulty traveling through the gel; they become entangled in the gel matrix. Shorter or smaller molecules migrate through the agarose matrix faster and thus travel farther in a given
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Pure aluminium is a relatively soft‚ silvery white metal. When exposed to air‚ a thin coating of Aluminium oxide gives it a dull lustre. It is three times less dense than water‚ and has great strength when alloyed‚ it doesnt rust and has high electrical conductivity‚ and Aluminium is also ductile‚ making it a very useful metal. Aluminium readily makes alloys with copper‚ zinc‚ magnesium‚ manganese and silicon. Aluminium foil is 92-99% pure aluminium. Other uses of aluminium alloys include computers
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accelerators for x-ray lithography. Synchrotron radiation is synonymous with x-rays. From the initial invention of the x-ray tube in 1896 until about 1960‚ the brightness (the log of brilliance in Fig. 1) didn’t change very much. About that time rotating anode tubes ap peared. Then‚ starting in the Sixties‚ synchrotron radiation facilities began pop ping up. They appeared at Madison and Stanford and at various places in Europe‚ including England‚ where I became involved about 20 years ago. Soon‚ these
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This means that the ions are reduced. 2. Metal atom on the surface may lose "n" electrons to the electrode and enter the solution as the ion Mn+ meaning that the metal atoms are oxidized. When an electrode is oxidized in a solution‚ it is called an anode and when an electrode is reduced in solution. it is called a cathode.1 Figure 1 A voltaic cell Research Question: What is the effect of decreasing the activity of the metal pairs used with Cu to make a voltaic cell‚ on the voltage of the cell
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CATHODE RAYS 3.1.1 Explain that cathode ray tubes allowed the manipulation of a stream of charged particles. DEFINITTIONS: * Cathode Ray Tube: is an evacuated tube which allows the unobstructed movement of cathode rays from a cathode to an anode. * Cathode Ray: Are negatively charged particles and can therefore be deflected. * This can be shown by 3 facts: * They leave –ve charge on the surfaces they strike * They are deflected by magnetic fields as predicted
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