Semiconductors: Band Gap of Germanium and the Hall Effect Friday‚ Section 006 TA: Yilikal Ayino John Greavu with Daniel Erickson & Kevin Haar February 14‚ 2014 PreLab With the new understanding of quantum mechanics and solid-state physics in the 1930’s came the development of semiconductors. Semiconductors are materials such as silicon and germanium in which the current density is non-zero‚ unlike an insulator‚ yet still several magnitudes smaller than that of a conductor. There exists a significant
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ball is attracted to the ruler. Explain why the ball is attracted to the ruler. What is the name of this process? (3) Draw a sketch showing how the charge is distributed on the surface of the ball. (3) Provide ONE example of where this electrostatic attraction is used in everyday life and an advantage of its use. (2) [18] Things that I am unsure
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The band gap value of the DBAP molecule was calculated as 5.60 eV‚ which indicates that the DBAP molecule has stable molecular structure and the value is comparable with the band gap energy value of the reported bio-active molecules [16]. The higher hardness and lower softness value indicates the stability of the DBAP molecule. The obtained lower chemical potential and electrophilicity index values are comparable with the potential bioactive molecules [14‚ 16]. DOS spectrum was also simulated by
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I think i should post it here so that some1 else may get helped too. Here you go: ----------------------------------------------------------- I obtained my degree of Bachelors of Science in Electrical Engineering‚ with communications as a major from XYZ University of Engineering and Technology‚ in October 2004. I have been registered as a professional engineer with Pakistan Engineering Council (PEC). After graduation‚ I joined XYZ Pvt. Ltd as an Engineer in CDMA department. XYZ had been awarded
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Chapter 4--The Three-Dimensional Structure of Proteins Student: ___________________________________________________________________________ 1. Exhibit 4A The following question(s) refer to this peptide: Cys-Ala-Gly-Arg-Gln-Met Refer to Exhibit 4A. Total hydrolysis of the peptide in HCl would yield these products: A. Ala‚ Arg‚ Cys‚ Gln‚ Gly‚ Met B. Ala‚ Arg‚ 2 Cys‚ Gln‚ Gly‚ H2S C. Ala‚ Arg‚ Cys‚ Glu‚ Gly‚ Met‚ NH3 D. Ala‚ Arg‚ 2 Cys‚ Glu‚ Gly‚ H2S‚ NH3 E. None of these answers is
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Very Violent reaction | Very Violent | No reaction (Metals are very reactive and form very stable oxides; A lot of energy is required to overcome the strong electrostatic forces of attraction between the ions) | No reaction (Metals are very reactive and form very stable oxides; A lot of energy is required to overcome the strong electrostatic forces of attraction between the ions) | Na | | | | | | | Ca | Forms oxides | Metal sinks in water‚ effervescence seen;Metal hydroxide and hydrogen
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Chemical Bonding Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms. The bound state implies a net attractive force between the atoms ... a chemical bond. The two extreme cases of chemical bonds are: Covalent Bonds Covalent chemical bonds involve the sharing of a pair of valence electrons by two atoms‚ in contrast to the transfer of electrons in ionic bonds. Such bonds lead
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CONTENTS Topics Page No ENERGY TYPES OF ENERGY ENERGY RESOURCES ADVANTAGES AND DISADVANTAGES ENERGY CONSERVATION REFERENCE ENERGY Energy is one of the most fundamental parts of our universe. We use energy to do work. Energy lights our cities. Energy powers our vehicles‚ trains‚ planes and rockets. Energy warms our homes‚ cooks our food‚ plays our music‚ gives us pictures on television. Energy powers machinery in factories
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Devra Burkhalter Physics 3rd Period February 4‚ 2013 The Scientist’s Major Contributions Scientists have vast involvement and contribution in the development and advancement of human civilization. Throughout the history of the world‚ many scientists have devoted their lives for research and innovation. Some of them even faced a lot of torture for their theories but they continued their mission and thus we are now in a modern world. Some of those dedicated scientists are Benjamin Franklin‚ Robert
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The 5th state of matter INTRODUCTION Ice is transformed to water at 0°C when the energy of its molecules (particles) increases. Water is similarly transformed to vapor at 100°C (Fig.1). Much stronger zigzag motion of the particles separates and ionizes hydrogen and oxygen i.e. plasma comes into existence (above 13 000 K). Do all bodies fit one of these four states of matter? The answer is: no‚ e.g. the solar corona does not! Fig. 1 The temperature scale. It starts at 0K. Is it infinite long
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