and became the most used technology to be implemented in VLSI chips. The phrase "metal–oxide–semiconductor" is a reference to the physical structure of certain field-effect transistors‚ having a metal gate electrode placed on top of an oxide insulator‚ which in turn is on top of a semiconductor material. Aluminum was once used but now the material is polysilicon. Other metal gates have made a comeback with the advent of high-k
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down to its fullest potential they reach the lowest possible temperature‚ which is absolute zero. The reason to why some objects feel cooler than others although they are all at room temperature is due to certain objects being better conductors and insulators of heat. Chapter 4 Summary Gravity is inevitable‚ no matter how many times you try jumping off a cliff you will fall towards the Earth and this is due to the Earth’s gravity lying in the center of the Earth. This causes objects to be pulled down
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current in our daily life as in electric iron‚ electric bulb‚ electric fuse‚ electric heater and more. Heating effect of electric current are below (i) Electric iron: In an iron the upper part is grooved. In this groove a coil is placed. Mica as an insulator is placed between the metal part and the coil‚ so that there is no electrical connection between them. Mica is a bad conductor of electricity but it is a good conductor of heat. Due to the flow of current through the coil it becomes heated and the
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trapping rising heat in the house. The convection current does not allow the uninsulated lofts to move the air in the insulation. Heat energy in the loft is transferred by the convection currents to the roof tiles. It has trapped air which is a poor insulator as warm particles are less dense. There are four basic types of insulating materials used are matting‚loose-fill‚blown insulation is made of fire and rigid insulating boards. The thickness of the material plays a big part for the loft insulation
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edu/matseed/mse_resources/Webpage/Ceramics/ceramicproperty.htm • Hard: not easily broken‚ bent‚ or pierced. • Wear-resistant: it wont ware away easily if you keep it for along time • Brittle: it can break easily if it drops on the floor. • Thermal insulators: it keeps heat in and the cold out. Ceramics – Porcelain and False Teeth! 1. What is porcelain? What are its properties and uses? Porcelain is a ceramic material made by heating raw materials‚ normally including clay in the form
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STRATEGIC MANAGEMENT ASSIGNMENT Submitted by‚ Sruthi Krishna Prathap M130031MS SOMS-NITC Date:09/02/2014 History of Birla Group The Birla family is a family of repute and standing in the industrial and social history of India. Shiv Narain Birla‚ a member of the Marwari Maheshwaricommunity from Pilani in the westerly state of Rajasthan
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few small home maintenance tasks can help to minimize the risk to exterior plumbing which can lead to interior pipes bursting. A plumber can talk to you about the importance of a frost proof spigot and will usually recommend installing a faucet insulator. An experience plumber can also evaluate your exterior plumbing and locate areas that are at risk for damage and propose solutions that fit within your
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Today’s world is overrun by computers from the small to the big. These include the desktop that is in many homes to the cell phones in your pocket. Even things like your car‚ dishwasher‚ dvd player‚ and even TVs include some form of computers. All this would not be possible without the invention of the integrated circuit or IC. This led to the creation of the Microprocessor or CPU (central processing unit) which acts as the brain of the computer. To better help illustrate the function and need for
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Solar seeker: In this project we design a solar seeker to follow a sun. solar seeker follow the sun and if the sensor attach on the sensor a sense a sun then solar seeker is stop automatically. Now after some time sun move from its position‚ then again seeker sensor sense the light and move the motor very slowly. If the sensor sense the signal then automatically stop the seeker . Movement of the seeker is restricted from left to right for limited area. To control the left and right limit
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a third of what a similar house is made of using concrete and bricks. Furthermore‚ not only are the bottle-bricks houses made more affordable‚ but they are also made more durable than the conventional houses. The bottles packed with sand act as insulators against heat‚ thereby making the house suitable in warm weather climates such as in Nigeria or in Cambodia. In addition‚ the compact sand plays a significant role in making the house bullet and fireproof‚ as well as making it earthquake resistant
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