Physical Properties of a Horseshoe Magnet
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Station C Station D
Session 3 Transparency #3b Station C Station D 111MINII Wm. - DOCUMENT RESUME ED 274 529 SE 047 224 AUTHOR Heller, Patricia TITLE Building Telegraphs, Telephones, and Radios for Middle School Children and Their Parentg. A Course for Parents and Children. INSTITUTION Minnesota Univ., Minneapolis. SPONS AGENCY National Science Foundation, Washington, D.C. PUB DATE 82 GRANT 07872 NOTE 239p.; For related documents, see SE 047 223, SE 047 225-228. Drawings may not reproduce well. PUB TYPE Guides - Non-Classroom Use (055) -- Guides - Classroom Use - Materials (For Learner) (051) -- Guides - Classroom Use - Guides (For Teachers) (052) EDRS PRICE MF01/PC1O. Plus Postage. DESCRIPTORS Audio Equipment; Electronic Equipment; Elementary Education; *Elementary School Science; Intermediate Grades; *Parent Child Relationship; Parent Materials; Parent Participation; *Radio; *Science Activities; Science Education; *Science Instruction; Science Materials; Teaching Guides; *Telephone Communications Systems IDENTIFIERS Informal Education; *Parent Child Program ABSTRACT Designed to supplement a short course for middle school children and their parents, this manual provides sets of learning experiences about electronic communication devices. The program is intended to develop positive attitudes toward science and technology in both parents and their children and to take the mystery out of some of the electronic devices used in communication systems. The document includes information and activities to be.used in conjunction with five sessions which are held at a science museum. The sessions deal with: (1) investigating circuits; (2) electromagnetism and the telegraph; (3) electromagnetic induction and the telephone; (4) crystal radio receivers; and (5) audio amplifiers. The sections of the guide which deal with each topic include an overview of the topic and descriptions of all of the activities and experiments to be done in class for that particular session. -
UNIT 25: MAGNETIC FIELDS Approximate Time Three 100-Minute Sessions
Name ______________________ Date(YY/MM/DD) ______/_________/_______ St.No. __ __ __ __ __-__ __ __ __ Section_________Group #________ UNIT 25: MAGNETIC FIELDS Approximate Time three 100-minute Sessions To you alone . who seek knowledge, not from books only, but also from things themselves, do I address these magnetic principles and this new sort of philosophy. If any disagree with my opinion, let them at least take note of the experiments. and employ them to better use if they are able. Gilbert, 1600 OBJECTIVES 1. To learn about the properties of permanent magnets and the forces they exert on each other. 2. To understand how magnetic field is defined in terms of the force experienced by a moving charge. 3. To understand the principle of operation of the galvanometer – an instrument used to measure very small currents. 4. To be able to use a galvanometer to construct an ammeter and a voltmeter by adding appropriate resistors to the circuit. © 1990-93 Dept. of Physics and Astronomy, Dickinson College Supported by FIPSE (U.S. Dept. of Ed.) and NSF. Modified at SFU by S. Johnson, 2014. Page 25-2 Workshop Physics II Activity Guide SFU OVERVIEW 5 min As children, all of us played with small magnets and used compasses. Magnets exert forces on each other. The small magnet that comprises a compass needle is attracted by the earth's magnetism. Magnets are used in electrical devices such as meters, motors, and loudspeakers. Magnetic materials are used in magnetic tapes and computer disks. Large electromagnets consisting of current-carrying wires wrapped around pieces of iron are used to pick up whole automobiles in junkyards. -
Questions: Physical Properties and 7 Step Process
Questions: Physical Properties and 7 Step Process 1. Why does a water-saturated sandstone typically have a higher P-wave velocity than a dry sandstone? A saturated sandstone: a. is more dense b. has a larger bulk modulus c. has a larger shear modulus d. has a higher tensile strength 2. The relative permittivity of a given rock is considered large when: a. it contains a lot of pore water b. an applied electric field results in a larger electric dipole moment c. it has a value of 30 d. b and c are correct e. a,b and c are correct 3. You measure a resistance of 16 kΩ between two parallel faces of a 2cm x 2cm x 2cm cube. Determine the resistivity. a. 320 Ωm b. 800000 Ωm c. 32000 Ωm d. 8000 Ωm 4. You are flying a gravity survey over a sedimentary basin. The flight path crosses a known dyke. What would be the expected gravity response and why? a. Gravity high over the dyke; the dyke is more dense than the background b. Gravity low over the dyke; the dyke is less dense than the background c. Gravity high over the dyke; the dyke is less dense than the background d. Gravity low over the dyke; the dyke is more dense than the background 5. You are building a road through known active Karst terrain in Ireland. Which set of physical property contrasts would be most diagnostic for locating regions where sink- holes could form? a. Karstified: low density, Limestone: high density b. Karstified: low resistivity, Limestone: high resistivity c. -
AC Measurement System (ACMS) Option User's Manual
Physical Property Measurement System AC Measurement System (ACMS) Option User’s Manual Part Number 1084-100 C-1 Quantum Design 11578 Sorrento Valley Rd. San Diego, CA 92121-1311 USA Technical support (858) 481-4400 (800) 289-6996 Fax (858) 481-7410 Fourth edition of manual completed June 2003. Trademarks All product and company names appearing in this manual are trademarks or registered trademarks of their respective holders. U.S. Patents 4,791,788 Method for Obtaining Improved Temperature Regulation When Using Liquid Helium Cooling 4,848,093 Apparatus and Method for Regulating Temperature in a Cryogenic Test Chamber 5,311,125 Magnetic Property Characterization System Employing a Single Sensing Coil Arrangement to Measure AC Susceptibility and DC Moment of a Sample (patent licensed from Lakeshore) 5,647,228 Apparatus and Method for Regulating Temperature in Cryogenic Test Chamber 5,798,641 Torque Magnetometer Utilizing Integrated Piezoresistive Levers Foreign Patents U.K. 9713380.5 Apparatus and Method for Regulating Temperature in Cryogenic Test Chamber CONTENTS Table of Contents PREFACE Contents and Conventions ...............................................................................................................................vii P.1 Introduction .......................................................................................................................................................vii P.2 Scope of the Manual..........................................................................................................................................vii -
Lab 1 - Physical Properties of Minerals
Page - Lab 1 - Physical Properties of Minerals All rocks are composed of one or more minerals. In order to be able to identify rocks you have to be able to recognize those key minerals that make of the bulk of rocks. By definition, any substance is classified as a mineral if it meets all 5 of the following criteria: - is naturally occurring (ie. not man-made); - solid (not liquid or gaseous); - inorganic (not living and never was alive); - crystalline (has an orderly, repetitive atomic structure); - a definite chemical composition (you can write a discrete chemical formula for any mineral). Identifying an unknown mineral is like identifying any group of unknowns (leaves, flowers, bugs... etc.) You begin with a box, or a pile, of unknown minerals and try to find any group features in the samples that will allow you to separate them into smaller and smaller piles, until you are down to a single mineral and a unique name. For minerals, these group features are called physical properties. Physical properties are any features that you can use your 5 senses (see, hear, feel, taste or smell) to aid in identifying an unknown mineral. Mineral physical properties are generally organized in a mineral key and the proper use of this key will allow you to name your unknown mineral sample. The major physical properties will be discussed briefly below in the order in which they are used to identify an unknown mineral sample. Luster Luster is the way that a mineral reflects light. There are two major types of luster; metallic and non-metallic luster. -
Properties of Matter
Properties of Matter Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive content, visit www.ck12.org CK-12 Foundation is a non-profit organization with a mission to reduce the cost of textbook materials for the K-12 market both in the U.S. and worldwide. Using an open-content, web-based collaborative model termed the FlexBook®, CK-12 intends to pioneer the generation and distribution of high-quality educational content that will serve both as core text as well as provide an adaptive environment for learning, powered through the FlexBook Platform®. Copyright © 2013 CK-12 Foundation, www.ck12.org The names “CK-12” and “CK12” and associated logos and the terms “FlexBook®” and “FlexBook Platform®” (collectively “CK-12 Marks”) are trademarks and service marks of CK-12 Foundation and are protected by federal, state, and international laws. Any form of reproduction of this book in any format or medium, in whole or in sections must include the referral attribution link http://www.ck12.org/saythanks (placed in a visible location) in addition to the following terms. Except as otherwise noted, all CK-12 Content (including CK-12 Curriculum Material) is made available to Users in accordance with the Creative Commons Attribution/Non- Commercial/Share Alike 3.0 Unported (CC BY-NC-SA) License (http://creativecommons.org/licenses/by-nc-sa/3.0/), as amended and updated by Creative Commons from time to time (the “CC License”), which is incorporated herein by this reference. -
Radial Spin Wave Modes in Magnetic Vortex Structures
FACULTY OF SCIENCES Radial spin wave modes in magnetic vortex structures Doctoral thesis by Mathias Helsen Thesis submitted to obtain the degree of «Doctor in de Wetenschappen, Natuurkunde» at the Ghent University, Department of Solid State Sciences. Public defense: 3rd June 2015 Promotor: dr. Bartel Van Waeyenberge ii Dankwoord (acknowledgements) Ik zou willen beginnen door mijn promotor, prof. dr. Bartel Van Waeyenberge, te bedanken voor zijn ondersteuning gedurende mijn doctoraat. Bedankt dat ik jouw deur mocht platlopen om vragen te komen stellen, en je kantoor vol te stouwen met lawaaierige elektronica. Daarnaast zou ik graag mijn mentor, dr. Arne Vansteenkiste ook willen be- danken voor al zijn goede raad die onontbeerlijk was. En uiteraard om bij te sturen wanneer nodig (i.e. vaak), maar misschien nog het meest om sa- men koffie te drinken. De werkdag kon en mocht niet beginnen zonder een kop om-ter-sterkste koffie (hoewel de kwaliteit de laatste tijd toch zwaar achteruit ging). I would also like to thank my former colleague, dr. Mykola Dvornik; your deep cynism and honesty have been inspiring. It was more than once an «educational moment», especially your seminal work on flash-drive reliability. Daarnaast wil ik ook nog Jonathan en Annelies bedanken, jullie zijn een bij- zonder sympatiek koppel en ik was blij om samen met jullie op conferentie te kunnen gaan. Jonathan, uiteraard ook bedankt voor het aanslepen van koffie en flash drives. Hoewel die laatste niet heel erg betrouwbaar bleken (volgens het werk van dr. Dvornik). A special thanks goes to Ajay Gangwar of the University of Regensburg for pre- paring all my samples. -
Dielectric Properties and Other Physical Properties of Low-Acyl Gellan Gel As Relevant to Microwave Assisted Pasteurization Proc
Journal of Food Engineering 149 (2015) 195–203 Contents lists available at ScienceDirect Journal of Food Engineering journal homepage: www.elsevier.com/locate/jfoodeng Dielectric properties and other physical properties of low-acyl gellan gel as relevant to microwave assisted pasteurization process ⇑ Wenjia Zhang a, Donglei Luan a, Juming Tang a, , Shyam S. Sablani a, Barbara Rasco b, Huimin Lin a, Fang Liu a a Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164-6120, United States b UI/WSU bi-State School of Food Science and Human Nutrition, Washington State University, Pullman, WA 99164-6120, United States article info abstract Article history: Various model foods were needed as chemical marker carriers for the heating pattern determination in Received 1 April 2014 developing microwave heating processes. It is essential that these model foods have matching physical Received in revised form 5 October 2014 properties with the food products that will be microwave processed, such as meat, vegetables, pasta, Accepted 13 October 2014 etc. In this study, the physical properties of low acyl gellan gel were investigated to evaluate its suitability Available online 22 October 2014 to be used as a possible model food for the development of single mode 915 MHz microwave assisted pasteurization processes. These physical properties included the dielectric properties, gel strength and Keywords: water holding capacities. In order to adjust the dielectric constant and loss factor, various amounts of Low acyl gellan gel sucrose (0, 0.1, 0.3 and 0.5 g/mL (solution)) and salt (0, 100, 200, and 300 mM) were added to 1% gellan Dielectric properties 2+ Gel strength gel (with 6 mM Ca addition). -
PROPERTIES of MATERIALS This Page Intentionally Left Blank Properties of Materials Anisotropy, Symmetry, Structure
PROPERTIES OF MATERIALS This page intentionally left blank Properties of Materials Anisotropy, Symmetry, Structure ROBERT E. NEWNHAM Pennsylvania State University 1 3 Great Clarendon Street, Oxford OX26DP Oxford University Press is a department of the University of Oxford. It furthers the University’s objective of excellence in research, scholarship, and education by publishing worldwide in Oxford New York Auckland Bangkok Buenos Aires Cape Town Chennai Dar es Salaam Delhi Hong Kong Istanbul Karachi Kolkata Kuala Lumpur Madrid Melbourne Mexico City Mumbai Nairobi São Paulo Shanghai Taipei Tokyo Toronto Oxford is a registered trade mark of Oxford University Press in the UK and in certain other countries Published in the United States by Oxford University Press Inc., New York © Oxford University Press 2005 The moral rights of the authors have been asserted Database right Oxford University Press (maker) First published 2005 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, without the prior permission in writing of Oxford University Press, or as expressly permitted by law, or under terms agreed with the appropriate reprographics rights organization. Enquiries concerning reproduction outside the scope of the above should be sent to the Rights Department, Oxford University Press, at the address above You must not circulate this book in any other binding or cover and you must impose this same condition on any acquirer British Library Cataloguing in Publication Data Data available Library of Congress Cataloging in Publication Data Data available ISBN 0-19-852075-1 (hbk) ISBN 0-19-852076-x (pbk) 10987654321 Typeset by Newgen Imaging Systems (P) Ltd., Chennai, India Printed in Great Britain on acid-free paper by Antony Rowe, Chippenham Preface This book is about anisotropy and structure–property relationships. -
Conducting Properties of Polypropylene/ Carbon Nanofiber Composites
16TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS CONDUCTING PROPERTIES OF POLYPROPYLENE/ CARBON NANOFIBER COMPOSITES W. H. Zhong, G. Sui, M. A. Fuqua and C. A. Ulven Department of Mechanical Engineering North Dakota State University, Fargo, ND 58105, USA Keywords: carbon nanofibers, polypropylene, nanocomposites, conductivity Abstract particular, very few have reported work Effects of carbon nanofibers (CNFs) on addressing the effects of CNFs on the final the microstructure and properties of semi- properties of the resulting nanocomposites crystalline polymers were studied based on through the crystallization behavior of the preparation of polypropylene (PP) polymer matrix. nanocomposites by a twin-screw extrusion. As an effective processing method, twin- Crystallization behavior and morphology, as screw extrusion can play an important role in well as dielectric property, thermal and preparing of nanocomposites to obtain electrical conductivity of the CNF/PP nanocomposites with uniform microstructure nanocomposites were characterized. The [4-6]. degree of crystallinity of the PP exhibited an This paper introduces the preparation increased trend with addition of CNFs carbon nanofiber/PP nanocomposites by a followed by moderate decreases at higher Micro-18mm twin-screw extruder which can content. The PP nanocomposite containing provide the high shear compounding for 5wt% CNFs exhibited a surprisingly high polymer melts. After a great deal of dielectric constant under wide sweep exploring experiments, the optimal extruding frequencies attended by low dielectric loss. procedures for carbon nanofiber/PP With the increasing of CNF content, nanocomposites were established. The aim of electrical and thermal conductivities of the present work is to study the effects of nanocomposites were enhanced continuously. carbon nanofiber content on crystallization behavior, mechanical properties, thermal 1. -
Short Pulse Long Pulse
Radiolocation 2 Transmitter, receiver, display, antenna and waveguide arrangement, and their controls Radar design Antenna Waveguide echos T/R cell pulses Trigger Transmitter Receiver rotation marker R eadung Trigger H Processed echos Display Power supply Transmitter The transmitter comprises three main elements: ▫ Trigger generator – controls the number of radar pulses transmitted in one second PRF; ▫ Modulator – together with pulse forming network produces a pulse of the appropriate length, power and shape when is activated by the trigger; ▫ Magnetron – determines electromagnetic wave frequency of pulse which is sent then to the antenna by waveguide. Transmitter design Trigger Modulator Magnetron generator trigger Modulating RF pulse pulse to T/R cell Pulse length selection PRF selection Range and length of pulse selector Trigger generator • is a free-running oscillator which generates a continuous succession of low voltage pulses known as synchronizing pulses, or trigger pulses • Synchronization covers all systems that participate in the distance measurement process and therefore their synchronization is required to obtain a high accuracy of the measured distances. • These pulses control e.g. madulator, time base (memory cells selection), A/C Sea etc. Modulator • Forms a rectangular shaped electric pulses with great power (very high voltage tens of thousand volts and the current of hundreds of ampere). • Pulse forming network PFN is used, which consists of series connected cells of power storage components as capacitors and inductors. • They are charged relatively slow (about 1000 s), but discharging of the energy is very rapid (about 1 s). • It allows to use a low energy source to produce a high energy pulse. -
Engineering Properties of Foods - Barbosa-Cánovas G.V., Juliano P
FOOD ENGINEERING – Vol. I - Engineering Properties of Foods - Barbosa-Cánovas G.V., Juliano P. and Peleg M. ENGINEERING PROPERTIES OF FOODS Barbosa-Cánovas G.V. and Juliano P. Washington State University, USA Peleg M. University of Massachusetts, USA Keywords: Food engineering, engineering property, physical, thermal, heat, electrical, foods, density, porosity, shrinkage, particulates, powders, compressibility, flowability, conductivity, permittivity, dielectric, color, gloss, translucency, microstructure, microscopy, diffusivity, texture Contents 1. Introduction 2. Thermal Properties 2.1. Definitions 2.2. Thermal Variations in Properties and Methods of Determination 2.3. Food Processing Applications 3. Optical Properties 3.1 Definitions 3.2. Methods and Applications 4. Electrical Properties 4.1. Electrical Conductivity and Permittivity 4.2. Methods and Applications 5. Mechanical Properties 5.1. Structural and Geometrical Properties 5.1.1. Density 5.1.2. Porosity 5.1.3. Shrinkage 5.2. Rheology and Texture 6. Properties of Food Powders 6.1. Primary Properties 6.2. Secondary Properties 7. Role ofUNESCO Food Microstructure in Engineering – EOLSSProperties 7.1. Structural Characterization of Foods 7.2. Practical Implications Glossary SAMPLE CHAPTERS Bibliography Biographical Sketches Summary The engineering properties of foods are important, if not essential, in the process design and manufacture of food products. They can be classified as thermal (specific heat, thermal conductivity, and diffusivity), optical (color, gloss, and translucency), electrical (conductivity and permittivity), mechanical (structural, geometrical, and strength), and ©Encyclopedia of Life Support Systems (EOLSS) FOOD ENGINEERING – Vol. I - Engineering Properties of Foods - Barbosa-Cánovas G.V., Juliano P. and Peleg M. food powder (primary and secondary) properties. Most of these properties indicate changes in the chemical composition and structural organization of foods ranging from the molecular to the macroscopic level.