majority carriers in A) a p-type semiconductor. B) a pn junction semiconductor. C) an n-type semiconductor. D) None of the above. 7) 8) Semiconductor materials are those with A) conductive properties that are in between those of a conductor or an insulator. B) no conductive properties. C) conductive properties that are very good. D) Either A or B. 8) 9) There is current through the junction of a forward -biased diode. This current is called A) forward current. B) reverse breakdown current. C) reverse
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Psychology chapter three vocabulary nervous system‚ a collection of hundreds of billions of specialized and interconnected cells through which messages are sent between the brain and the rest of the body. The nervous system consists of the central nervous system (CNS)‚ made up of the brain and the spinal cord‚ and the peripheral nervous system (PNS)‚ the neurons that link the CNS to our skin‚ muscles‚ and glands. And we will see that our behavior is also influenced in large part by the endocrine
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1 Heat and Gases Chapter 1 Temperature and Thermometers New Senior Secondary Physics at Work Oxford University Press 2009 1 1 Temperature and Thermometers Practice 1.1 (p. 10) 1 B 2 D 3 A 4 Temperature is a measure of the degree of hotness of an object. 5 (a) On the Celsius temperature scale‚ the lower fixed point is the ice point (0 C) and the upper fixed point is the steam point (100 C). (b) We can reproduce the lower and upper fixed points by using pure melting ice and pure
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Electric Field and the Movement of Charge Perhaps one of the most useful yet taken-for-granted accomplishments of the recent centuries is the development of electric circuits. The flow of charge through wires allows us to cook our food‚ light our homes‚ air-condition our work and living space‚ entertain us with movies and music and even allows us to drive to work or school safely. In this unit of The Physics Classroom‚ we will explore the reasons for why charge flows through wires of electric circuits
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adrenoleukodystrophy (ALD) Plot At the beginning of the film‚ Lorenzo (played by Noah Banks and also Zack O’Malley Greenburg) is a bright and vibrant young boy living in the Comoros Islands‚ as his father Augusto (played by Nick Nolte) works for the World Bank and is stationed there. However‚ when his parents relocate to the United States‚ he begins to show neurological problems‚ such as loss of hearing‚ tantrums‚ etc. The boy is diagnosed as having adrenoleukodystrophy (ALD)‚ which is fatal within
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What are monomers? molecules that can bond to form polymers. building blocks. What are polymers? Chain of monomers. What is the process of polymerization? Taking monomers and making polymers. What are the four molecule characteristics of living things? Proteins(made from amino acids)‚ Carbohydrates(made from monosaccharides)‚ Nucleic acid( made from nucleotides)‚ lipids What is a macromolecule? give examples Polymers with molecular weight exceeding 1000 g/mol. examples:
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Life is better with Tervis Tervis‚ a term coined by combining the last three letters of two last names‚ Mr. Frank Cotter and Mr. G. Howlett Davis. These two engineers realized when completely sealing air between two plastic walls makes a great insulator and the Tervis tumbler was born. The inventors sold the rights and the company to the current owners in the 1960s. Tervis is still owned by the Donelly family and is located in Florida. Tervis offers a fun‚ custom‚ easy to maintain‚ “green” alternative
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x 1/100 d. Efficiency = input energy / output energy x 1/100 The most common material used to manufacture brushes used in a.c. and d.c. rotating machines is a. copper b. aluminium c. bronze d. carbon answer: d The material used as an insulator on which overhead lines are suspended from pylons is: a. glass b. mica c. P.V.C. d. rubber answer: a Electric current is the flow of negatively charged particles called: a. protons b.
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www.visionias.cfsites.org www.visionias.wordpress.com IAS PHYSICS Main – Syllabus Paper- I: Section-A 1. Classical Mechanics (a) Particle dynamics Centre of mass and laboratory coordinates‚ conservation of linear and angular momentum. The rocket equation. Rutherford scattering‚ Galilean transformation‚ intertial and non-inertial frames‚ rotating frames‚ centrifugal and Coriolis forces‚ Foucault pendulum. (b) System of particles Constraints‚ degrees of freedom‚ generalised coordinates and momenta
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Space technology has benefited our modern society. To what extent has it benefitted us? (Word Count: -25) This picture of our blue planet has become so mundane that even grade school students would cease to be mesmerised by it. Thanks to daily real-time forecast on TV‚ the picture of mother earth has almost become ho-hum. Weather forecast has improved to a point where we take the forecast for granted. Without realising it‚ the technological spin-offs from Space Program (spinoff.nasa.gov) of the
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