...the Characteristics of Sound Sound and music are parts of our everyday sensory experience. Just as humans have eyes for the detection of light and color, so we are equipped with ears for the detection of sound. We seldom take the time to ponder the characteristics and behaviors of sound and the mechanisms by which sounds are produced, propagated, and detected. The basis for the understanding of sound, music and hearing is the physics of waves. Sound is a wave which is created by vibrating objects and propagated through a medium from one location to another. In this subject, we will investigate the nature, properties and behaviors of sound waves and apply basic wave principles towards an understanding of music. The Elements of Communication Communication: transfer of information from a source or stimulus through a medium to a reception point. The medium through which the information travels can be air, water, space or solid objects. Information that is carried through all natural media takes the form of waves - repeating patterns that oscillate back and forth. E.g. light, sound, electricity radio and TV waves. Stimulus: A medium must be stimulated in order for waves of information to be generated in it. A stimulus produces energy, which radiates outwards from the source in all directions. The sun and an electric light bulb produce light energy. A speaker, a vibrating guitar string or tuning fork and the voice are sound sources, which produce sound energy waves. Medium: A medium is...
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...*Physics Prelims (1-7).qxd 12/11/08 1:00 PM Page 1 SCIENCE VISUAL RESOURCES PHYSICS An Illustrated Guide to Science The Diagram Group *Physics Prelims (1-7).qxd 12/11/08 1:00 PM Page 2 Physics: An Illustrated Guide to Science Copyright © 2006 The Diagram Group Author: Derek McMonagle BSc PhD CSci CChem FRSC Editors: Catherine Gaunt, Jamie Stokes Design: Anthony Atherton, Richard Hummerstone, Lee Lawrence, Tim Noel-Johnson, Phil Richardson Illustration: Peter Wilkinson Picture research: Neil McKenna Indexer: Martin Hargreaves All rights reserved. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval systems, without permission in writing from the publisher. For information contact: Chelsea House An imprint of Infobase Publishing 132 West 31st Street New York NY 10001 For Library of Congress Cataloging-in-Publication Data, please contact the Publisher ISBN 0-8160-6167-X Chelsea House books are available at special discounts when purchased in bulk quantities for businesses, associations, institutions, or sales promotions. Please call our Special Sales Department in New York at 212/967-8800 or 800/322-8755. You can find Chelsea House on the World Wide Web at http://www.chelseahouse.com Printed in China CP Diagram 10 9 8 7 6 5 4 3 2 This book is printed on acid-free paper. *Physics Prelims (1-7).qxd 12/11/08 1:00 PM Page...
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...Module 3 Waves and the Electromagnetic Spectrum Topic: Waves 1. What is a wave? A wave is vibration that travels and all waves are created by something vibrating. Waves transport energy but do not transport mass. 2. Describe the following terms associated with waves: a. amplitude height of wave b. wavelength length of a wave c. frequency number of waves per second (Hz) d. period how long a wave lasts when it arrives at a fixed point (measured in seconds) 3. What are radio waves? An electromagnetic wave of a frequency used for long distant communication. 4. Explain the difference between a transverse wave and a longitudinal wave, and give examples of each. In a longitudinal wave, the vibration travels in the same direction that wave travels. Examples of longitudinal waves include: Sound, p-waves (earthquakes) In a transverse wave, the vibration direction is perpendicular to direction that wave travels. Examples include: Light/electromagnetic, (radio, microwave, xray, etc.), water waves, swaves (earthquakes). The major difference between longitudinal and transverse waves is their direction. Longitudinal waves move left to right while transverse waves move up and down. 5. Compare and contrast: light waves vs. sound waves Light waves are transverse and sound waves are longitudinal. Light waves can travel through a vacuum but sound waves cannot. Speed of light is nearly 300 million m/s while sound has a speed of about 340 m/s...
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...Central Nervous System * Brain and Spinal Cord * Conscious and reflexive Motor and Sensory * Continuous with Peripheral Nervous System Reflex Arc Reminder: Association neuron can modulate Autonomic Nervous System * Part of peripheral but feeds back to the central. * Cranial nerves are peripheral, but have to the do with the autonomic as well. * Parallel subconscious (?) CNS/PNS * Visceral control * Homeostasis Ventricles of the Brain * Interior CSF filled spaces * Interconnected * Continuous with the Subarachnoid Space * Contain Choroid Plexes which produce CSF * Important landmarks for location of structures * Intracranial pressure (ICP) monitors * Impanted and help monitor, because if too high pt stop breathing and die. Lobes of the Cerebral Hemispheres * 5 types of lobes and two of each type. Each hemisphere divided into 5. Correspond to the bones of the skull (close enough) * Frontal Lobes * Parietal Lobes * Occipital Lobes * Temporal Lobes * Insula Lobes * This lobe is hiding behind the temporal lobe. In folded inside, about the size of a walnut. * Outer Cortex is the outer 2-3 mm * Gyrate are the raised bumps are and sulcis are the grooves between * Cortex is all wadded up into smaller volume Frontal Lobe Functions * Personality * Asses in traumatic brain injury, or if you see change in behavior – aggressive etc * Analysis ...
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...SENIOR SECONDARY COURSE PHYSICS 1 (CORE MODULES) Coordinators Dr. Oum Prakash Sharma Sh. R.S. Dass NATIONAL INSTITUTE OF OPEN SCHOOLING A-25, INSTITUTIONAL AREA, SECTOR-62, NOIDA-201301 (UP) COURSE DESIGN COMMITTEE CHAIRMAN Prof. S.C. Garg Former Pro-Vice Chancellor IGNOU, Maidan Garhi, Delhi MEMBERS Prof. A.R. Verma Former Director, National Physical Laboratory, Delhi, 160, Deepali Enclave Pitampura, Delhi-34 Dr. Naresh Kumar Reader (Rtd.) Deptt. of Physics Hindu College, D.U. Dr. Oum Prakash Sharma Asstt. Director (Academic) NIOS, Delhi Prof. L.S. Kothari Prof. of Physics (Retd.) Delhi University 71, Vaishali, Delhi-11008 Dr. Vajayshree Prof. of Physics IGNOU, Maidan Garhi Delhi Sh. R.S. Dass Vice Principal (Rtd.) BRMVB, Sr. Sec. School Lajpat Nagar, New Delhi-110024 Dr. G.S. Singh Prof. of Physics IIT Roorkee Sh. K.S. Upadhyaya Principal Jawahar Navodaya Vidyalaya Rohilla Mohammadabad (U.P.) Dr. V.B. Bhatia Prof. of Physics (Retd.) Delhi University 215, Sector-21, Faridabad COURSE DEVELOPMENT TEAM CHAIRMAN Prof. S.C. Garg Former Pro-Vice Chancellor IGNOU, Delhi MEMBERS Prof. V.B. Bhatia 215, Sector-21, Faridabad Prof. B.B. Tripathi Prof. of Physics (Retd.), IIT Delhi 9-A, Awadhpuri, Sarvodaya Nagar Lucknow-226016 Sh. K.S. Upadhyaya Principal Navodaya Vidyalaya Rohilla Mohammadabad, (U.P.) Dr. V.P. Shrivastava Reader (Physics) D.E.S.M., NCERT, Delhi EDITORS TEAM CHAIRMAN Prof. S.C. Garg Former Pro-Vice Chancellor IGNOU, Delhi MEMBERS Prof. B.B. Tripathi Prof...
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...experimented and the solutions were implemented in the work floor by Robin Nicolai et al [6]. Noisy atmospheres develop job dissatisfaction due to its effects on health aspects. Fatigue, blood pressure variation, head ache and peptic ulcer are the common diseases found with people who are working in a noisy environment for long time [7]. Some of the environments like market, metal forming industrial areas, ordinance training areas are always noise prone areas. An effective control measures is required for both living and floating populations. Sound level plays a major role in its harms and exposing period plays an important role in noise effects [13]. Sound Pressure Level increases with increase of frequency and vice versa. It is also taken into account for noise assessment. The surface of the building even it is hard in nature will reflect sound waves mostly. This effect is called as ‘Façade Effect’ and the stability of the building due to sound waves depends upon this effect also. It is high when closer to the surface and low when the observer is away from that surface. Three techniques to reduce the noise are commonly used. One is at sources, second is by maintaining adequate distance and the third is the usage of barriers [14]. Many social welfare organizations are involved in occupational health improvement activities and gives ideas and tips to workers for developing their health in hazardous work spots. Safe Work Australia is one such organization which has many useful and practicable...
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...Physics PHYSICS FORMULAE AND PRINCIPLES Fundamental quantities and SI units The standard units were set up by the international system of units, SI The fundamental quantities, there symbols and there SI units a listed below Quantity symbol SI unit & unit symbol Length l metre (m) Mass m kilogram (k g) Time t second (s) Temperature T Kelvin (k) Current I Ampere (A) Amt. substance mol mole 6.02 x 10 23 (molecules) Luminous intensity - candela (c d) MULTIPLES AND SUBMULTIPLES Multiples are larger than the base units and submultiples are smaller than the base units Multiples Symbol Prefix Meaning Example Deca d 10 1 0 Decameter Hecto h 102 100 Hectometer ...
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...Study Guide for 301 Chapter 1 Development - the pattern of movement or change that begins at conception and continues through the human life span. Life Span perspective = views development as lifelong, multidimensional, multidirectional, plastic, multidisciplinary, and contextual and as a process that involves growth, maintenance, and regulation of loss. Life expectancy – the average # of years that a person born in a particular year can expect to live Multidimensional – for example can include attention, memory, abstract thinking and speed of processing information and social intelligence. Plastic – means the capacity for change; for example can you still improve your intellectual skills when you are in your 60’s or 70’s. Or may they be fixed by your 30’s Contextual – contexts include families, schools, peer groups, churches, cities, neighborhoods. Each is influenced by historical, economic, social and cultural factors. Normative age- graded influences- are similar for individuals in a particular age group Puberty Menopause Starting kindergarten Normative history-graded influences- are common to people of a particular generation because of historical circumstances. Living time during a historical event WWII, cold War, great depression, 9/11, The Great Depression Non-normative life events - Individual events that happen to people. Kindergarten parents died Hurricane Katrina, car wreck, young kid has a stroke. Development Stages Prenatal (conception – birth)...
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...* Getting Ready Signs of Labor: happens 2-3 weeks prior to true labor ~ lightening (engagement): baby drops down and presses on bladder ~nesting: mom has sudden burst of energy ~Braxton Hicks contractions ~cervical ripening (softening and dilating) ~bloody show * Effacement: the thinning of the cervix; measured from 0-100% * Dilatation: the opening of the cervix; measured from 0-10 cm * Stages of Labor: ~1st Stage -Early/Latent: -0-3 cm dilatation -contractions 5-30 min apart -lasting 30-45 seconds -mild to moderate intensity -lasting 6-8 hours -Active: -4-7 cm dilatation -contractions 3-5 min apart -lasting 40-70 seconds -mild to strong intensity -lasting 3-6 hours -inwardly directed, focused, serious -Transition: -8-10 cm dilatation -contractions 2-3 min apart -strong intensity -lasting 45-90 seconds -lasting about 20-30 min -severe pain, N/V, irritable ~2nd Stage: Pushing -from complete dilatation until the birth of the baby -Early/Latent: -contractions are weak; no urge to push yet -Active: -strong contractions resume; urge to push comes (Ferguson reflex) ~3rd Stage: Placenta -from the delivery of the baby to the delivery of the placenta -usually occurs within 10 min -uterus changes shape; globular right before it detaches; sudden gush of blood; cord lengthens ~4th Stage: Post partum Recovery -1st hour after birth -Post partum...
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...HEAD | PREVIOUS | Chapter 1 Introduction 1.1 What is a Plasma? 1.1.1 An ionized gas A plasma is a gas in which an important fraction of the atoms is ionized, so that the electrons and ions are separately free. When does this ionization occur? When the temperature is hot enough. Balance between collisional ionization and recombination: | Figure 1.1: Ionization and Recombination Ionization has a threshold energy. Recombination has not but is much less probable. Threshold is ionization energy (13.6eV, H). χi | Figure 1.2: Ionization and radiative recombination rate coefficients for atomic hydrogen Integral over Maxwellian distribution gives rate coefficients (reaction rates). Because of the tail of the Maxwellian distribution, the ionization rate extends below T = χi. And in equilibrium, when | nionsnneutrals | = | < σi v >< σr v > | , | | (1.1) | the percentage of ions is large ( ∼ 100%) if electron temperature: Te >~χi/10. e.g. Hydrogen is ionized for Te >~1eV (11,600°k). At room temp r ionization is negligible. For dissociation and ionization balance figure see e.g. Delcroix Plasma Physics Wiley (1965) figure 1A.5, page 25. 1.1.2 Plasmas are Quasi-Neutral If a gas of electrons and ions (singly charged) has unequal numbers, there will be a net charge density, ρ. ρ = ne(−e) + ni(+e) = e (ni − ne) | | (1.2) | This will give rise to an electric field via ∇ . E= | ρϵ0 | = | eϵ0 | (ni − ne) | | (1.3) | Example:...
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...Chapter 1, Introduction CHAPTER 1 Conceptual Problems C1. A room in a house has a floor area of 120 ft2. Which of the following is most likely the approximate volume of the room? a. 3 m3 b. 30 m3 c. 300 m3 d. 3 000 m3 C2. When SI units are plugged into an equation, it is found that the units balance. Which of the following can we expect to be true for this equation? a. The equation will be dimensionally correct. b. The equation will be dimensionally correct except sometimes in cases when the right hand side of the equation has more than one term. c. The equation will not be dimensionally correct. d. All constants of proportionality will be correct. C3. How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons? Think of your answers in terms of order of magnitude. a. about a decade b. about a century c. about a thousand years d. since Aristotle C4. Consider the sine of any angle between 30° and 40°. If the angle were doubled, what would happen to the sine of the angle? a. It would double. b. It would more than double. c. It would increase but be less than double. d. In different cases, it could do any of the above. C5. There are other ways of expressing uncertainty besides significant figures. For example, suppose a quantity is known to have a value between 20.4 and 20.0 and our best estimate of the value is midrange at 20.2. We could write the number as 20.2 +/- 0.2 and say that the number has a 1% uncertainty. We would...
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...Introduction to Multimedia Systems This Page Intentionally Left Blank Introduction to Multimedia Systems Editors Gaurav Bhatnagar Shikha Mehta Sugata Mitra Centre for Research in Cognitive Systems (CRCS) NIITUd. New Delhi, India ACADEMIC PRESS A Harcourt Science and Technology Company San Diego San Francisco New York Boston London Sydney Tokyo Cover art: © 2001 John Foxx Images This book is printed on acid-free paper, w Copyright © 2002 by ACADEMIC PRESS All Rights Reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Requests for permission to make copies of any part of the work should be mailed to: Permissions Department, Harcourt Inc., 6277 Sea Harbor Drive, Orlando, Florida 32887-6777 Explicit permission from Academic Press is not required to reproduce a maximum of two figures or tables from an Academic Press chapter in another scientific or research publication provided that the material has not been credited to another source and that full credit to the Academic Press chapter is given. Academic Press A division of Harcourt, Inc. 525 B Street, Suite 1900, San Diego, Cahfomia 92101-4495, USA http://www.academicpress.com Academic Press Harcourt Place, 32 Jamestown Road, London NWl 7BY, UK http ://www. academicpress...
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...Introductory Physics I Elementary Mechanics by Robert G. Brown Duke University Physics Department Durham, NC 27708-0305 rgb@phy.duke.edu Copyright Notice Copyright Robert G. Brown 1993, 2007, 2013 Notice This physics textbook is designed to support my personal teaching activities at Duke University, in particular teaching its Physics 141/142, 151/152, or 161/162 series (Introductory Physics for life science majors, engineers, or potential physics majors, respectively). It is freely available in its entirety in a downloadable PDF form or to be read online at: http://www.phy.duke.edu/∼rgb/Class/intro physics 1.php It is also available in an inexpensive (really!) print version via Lulu press here: http://www.lulu.com/shop/product-21186588.html where readers/users can voluntarily help support or reward the author by purchasing either this paper copy or one of the even more inexpensive electronic copies. By making the book available in these various media at a cost ranging from free to cheap, I enable the text can be used by students all over the world where each student can pay (or not) according to their means. Nevertheless, I am hoping that students who truly find this work useful will purchase a copy through Lulu or a bookseller (when the latter option becomes available), if only to help subsidize me while I continue to write inexpensive textbooks in physics or other subjects. This textbook is organized for ease of presentation and ease of learning. In particular, they are...
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...AS Biology Unit 1 page 1 AQA AS Biology Unit 1 Contents Specification Biological Molecules Chemical bonds Carbohydrates Lipids Proteins Biochemical Tests Enzymes Eukaryotic Cells Prokaryotic Cells Cell Fractionation Microscopy The Cell Membrane Movement across Cell Membranes Exchange The Gas Exchange System Lung Diseases The Heart Coronary Heart Disease The Digestive System Cholera Lifestyle and Disease Defence against Disease Immunisation Monoclonal Antibodies 1 – Mathematical Requirements 2– The Unit 1 Exam 2 4 6 8 10 16 17 24 28 30 31 35 37 44 46 50 54 58 60 67 68 72 80 81 83 86 Cells Human Physiology Disease Appendices These notes may be used freely by A level biology students and teachers, and they may be copied and edited. Please do not use these materials for commercial purposes. I would be interested to hear of any comments and corrections. Neil C Millar (nmillar@ntlworld.co.uk) Head of Biology, Heckmondwike Grammar School High Street, Heckmondwike, WF16 0AH July 2011 HGS Biology A-level notes NCM/7/11 AS Biology Unit 1 page 2 Biology Unit 1 Specification Biochemistry Biological Molecules Biological molecules such as carbohydrates and proteins are often polymers and are based on a small number of chemical elements. • Proteins have a variety of functions within all living organisms. The general structure of an amino acid. Condensation and the formation of peptide bonds linking together amino acids to form polypeptides. The relationship...
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...SCHAUM'S OUTLINE OF THEORY AND PROBLEMS OF COLLEGE PHYSICS Ninth Edition . FREDERICK J. BUECHE, Ph.D. Distinguished Professor at Large University of Dayton EUGENE HECHT, Ph.D. Professor of Physics Adelphi University . SCHAUM'S OUTLINE SERIES McGRAW-HILL New York St. Louis San Francisco Auckland Bogota Caracas Lisbon London Madrid Mexico City Milan Montreal New Delhi San Juan Singapore Sydney Tokyo Toronto McGraw-Hill abc Copyright © 1997, 1989, 1979, 1961, 1942, 1940, 1939, 1936 by The McGraw-Hill Companies, Inc All rights reserved. Manufactured in the United States of America. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written permission of the publisher. 0-07-1367497 The material in this eBook also appears in the print version of this title: 0-07-008941-8. All trademarks are trademarks of their respective owners. Rather than put a trademark symbol after every occurrence of a trademarked name, we use names in an editorial fashion only, and to the benefit of the trademark owner, with no intention of infringement of the trademark. Where such designations appear in this book, they have been printed with initial caps. McGraw-Hill eBooks are available at special quantity discounts to use as premiums and sales promotions, or for use in corporate training programs. For more...
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