Until the 1960s‚ the radio was the only significant electronics in an automobile. All other functions were entirely mechanical or electrical‚ such as the starter motor and the battery charging systems. There were no “intelligent safety systems‚” augmenting the bumper and structural members to protect occupants in case of accidents. Seat belts‚ introduced in the early 1960s‚ were for improving occupant safety and actuated completely mechanically. The driver or one of several mechanical control
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National Science Teachers Association Gerald F. Wheeler‚ Executive Director David Beacom‚ Publisher Copyright © 2008 by the National Science Teachers Association. All rights reserved. Printed in the United States of America. 11 10 09 08 4321 Library of Congress Cataloging-in-Publication Data Science as inquiry in the secondary setting / edited by Julie Luft‚ Randy L. Bell‚ and Julie Gess-Newsome. p. cm. Includes bibliographical references and index. ISBN 978-1-933531-26-7 1. Science--Study
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Applications of Silicon Silicon is one of man’s most useful elements. In the form of sand and clay it is used to make concrete and brick; it is a useful refractory material for high-temperature work‚ and in the form of silicates it is used in making enamels‚ pottery‚ etc. Silica‚ as sand‚ is a principal ingredient of glass‚ one of the most inexpensive of materials with excellent mechanical‚ optical‚ thermal and electrical properties. Hyperpure silicon can be doped with boron‚ gallium‚ phosphorus
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Jackson Bellinger “Turning Waste Heat into Power” Physicists at the University of Arizona have discovered a way to convert waste heat back into useable electricity‚ using molecular thermoelectricity. In addition to making many machines much more efficient‚ molecular thermoelectricity would make CFC’s not needed. This new technology makes it possible to convert heat into energy with no moving parts‚ and no pollution whatsoever. Charles Stafford‚ the associate professor of physics at the University
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and privacy • Strengthens legal defensibility Use of Computer Technology in Medicine The Use of Computers in Medicine The use of computer technology has greatly enhanced the medical field. This is particularly so in hospital environments where reliability and quality are critical factors. Many computer applications‚ such as patient information
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latent heat of fusion for water Specific latent heat is the amount of heat energy that is needed to change the state of one kilogram of a specific substance‚ whether it’s boiling or melting‚ without increasing or decreasing the temperature of the substance. Specific latent heat of fusion is the amount of heat energy that is needed to change a specific substance from solid to liquid. The specific latent heat of fusion for water is 334 KJ/ KG. Each substance has its own specific latent heat of fusion
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Usman Omid Biology IB 1A The Effect of Temperature on Beetroot Membranes _Aim_ This practical will test the effect of temperature on the integrity of the membranes‚ _Introduction_ The cells of beetroot contain a pigment called betalain in their vacuoles. It is kept inside the cells by the membranes. If these membranes are damaged‚ then the betalain leaks out. The amount that leaks out can be assessed‚ as the leaked out pigment will color the water surrounding the cells. This information can
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e * Medical Technologies: Industry trends | | | | * Point-of-care testing (POCT) is defined as medical testing at or near the site of patient care. The driving notion behind POCT is to conduct the test conveniently and immediately for the patient. * POCT is accomplished through the use of transportable‚ portable‚ and handheld instruments (for instance‚ blood glucose meter‚ nerve conduction study device) and test kits (such as CRP‚ HBA1C‚ Homocystein‚ HIV salivary assay). Cheaper
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Effect of Heat on Vitamin C Objective: - To determine whether the concentration of Vitamin C in a fruit juice changes upon heating at a constant temperature for different periods of time. - To investigate how the trend goes (whether the concentration of Vitamin C increases or decreases) if the amount of Vitamin C does change. Theory: - Hypothesis: The concentration of Vitamin C in the fruit juice changes and decreases upon heatingat a constant temperature for increasing periods of time
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The effect of temperature on a reaction rate In this experiment I shall be investigating how temperature affects the rate of reaction Rates of reaction The Factors that affect the rate of reaction are temperature‚ surface area‚ concentration‚ catalysts‚ light and pressure Surface area – Surface area is the amount of solid surface that is available for reaction - Only affects solids so this will not affect our
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