orthodontic process to straighten your teeth without permanently attaching metal wires on the outside of your teeth or using lots of rubber bands. Invisalign aligners are custom designed for your mouth and
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We saw in the last section that gases don’t conduct electricity in the same way as solids. One major difference between solids and gases is their electrical resistance (the opposition to flowing electricity). In a solid metal conductor such as a wire‚ resistance is a constant at any given temperature‚ controlled by the size of the conductor and the nature of the material. In a gas discharge‚ such as a fluorescent lamp‚ current causes resistance to decrease. This is because as more electrons
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Verizon and MCI: A Merger that Promotes Competition August 2005 POLICY STUDY No. 05-1 by Richard E. Wagner Harris Professor of Economics George Mason University; Fairfax‚ VA and Senior Fellow‚ Public Interest Institute Mt. Pleasant‚ IA POLICY STUDY August 2005 No. 05-1 Public Interest Institute Dr. Don Racheter‚ President Verizon and MCI: A Merger that Promotes Competition POLICY STUDIES are published as needed. They are longer‚ analytical articles on important
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Wire Symbols Electrical Wire Conductor of electrical current Connected Wires Connected crossing Not Connected Wires Wires are not connected Switch Symbols and Relay Symbols SPST Toggle Switch Disconnects current when open SPDT Toggle Switch Selects between two connections Pushbutton Switch (N.O) Momentary switch - normally open Pushbutton Switch (N.C) Momentary switch - normally closed DIP Switch DIP switch is used for onboard configuration SPST Relay Relay open
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in units of coulomb‚ abbreviated C. The quantum of charge‚ positive or negative‚ has the value 1.6 x 10 – 19 coulombs. Hence‚ 1 C = 6.25 x 1018 of electrons. The electron is the primary charge carrier in most electrical phenomena involving metal wires because it is the lightest and most mobile of the constituents of the atom. An electron has definite mass (me = 9.1 x 10 – 31 kg)‚ so it can conveniently be considered to be a particle in ordinary electrical phenomena. The mass of a proton is mp
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INTRODUCTION: ENERGY FROM THE SUN The sun has produced energy for billions of years. Solar energy is the sun’s rays (solar radiation) that reach the earth. Solar energy can be converted into other forms of energy‚ such as heat and electricity. In the 1830s‚ the British astronomer John Herschel used a solar thermal collector box (a device that absorbs sunlight to collect heat) to cook food during an expedition to Africa. Today‚ people use the sun’s energy for lots of things. Solar energy can
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house without the need to run new wires. The focus will be the consumer and how this product will alleviate certain burdens on them. The marketing strategy will be comprised of three aspects. The first will be to everyone the benefits of a wireless satellite dish. This will include not only the ongoing quality of the picture and sound‚ but also the ability for the homeowner to support multiple units from the same HUB without the need of running additional wires to those units. This will lead to
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Experiment No: EM-1 Title: Ohm’s Law‚ Meters‚ Resistivity I Purpose: The basic of simple electrical circuits and measurements is learned. Also‚ investigating the dependence of the resistance of a wire on its length‚ cross-sectional area‚ and the material of which it is made. By examining electrical resistance (R) through a metal conductor‚ the voltage (V) and current (I) through the conductor‚ the following principles will be demonstrated: 1.) Ohm’s Law 2.) Dependence of resistance (R)
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DirectWire Vehicle Information - 3/4/2012 2:00:50 PM 2000 Jeep Cherokee Wiring Information Item 12 Volts Wire Color Polarity Wire Location red & pink/black + ignition harness yellow + ignition harness dark blue + ignition harness black/orange + ignition harness black/white + ignition harness orange/purple - drivers kick panel pink/purple - drivers kick panel Second 12 Volts Starter Second Starter Ignition Second
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A bus topology is the minimum complex network configuration it creates use of a single transmission medium called a coaxial cable. The star topology consists of shielded twisted pair wire (STP) or unshielded twisted pair wires (UTP). Due to the high cost of STP wire‚ most networks use UTP‚ however‚ STP wire must be used if the distance between the hub and the node beat 110m. In most examples the cable is many different lengths joined by a T-connector which allows the cable to divide into various
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