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4.3.1 Arrhenius's law

In 1889 Arrhenius, a Swedish chemist, put forward a model to describe the way in which the rates of many chemical reactions could be accelerated by increasing temperature. His model is based on the idea that the rate at which such chemical reactions happen is proportional to the number of particles with enough thermal energy to overcome some sort of energy barrier. In other words, it relates the rate at which things happen to the fraction of particles having energies beyond some threshold ene
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Importing and Editing Images (4 of 10)
In this video you’ll learn how to import and edit images in Flash.
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Interjections 5 Song – Learn Grammar – Learning Upgrade
From the English Upgrade 5 course. (01:45)
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2.5 Sodium (Na), chlorine (Cl) and potassium (K)

The element sodium is a soft silvery metal and the element chlorine is a greenish gas that is poisonous to humans and many other animals. Yet when these two elements are combined together in a compound called sodium chloride, the properties are quite different. Sodium chloride in its solid form is composed of white crystals and we call it salt. When salt dissolves in water, the constituent sodium ions, Na+, and chloride ions, Cl , become separated. Both of these ions
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The Giza Pyramids
Video shows the pyramids at Giza. Discusses their history and Egyptian beliefs concerning the dead.
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Roof Types
Architectural Elements: Roof Types
Author(s): Oast House Archive

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Learning outcomes

After studying this course, you should be able to:

  • understand the underlying values and justifications of teaching art and art history within the school curriculum

  • understand developing strategies to explore and engage with some of the subject criticisms voiced

  • understand enhancing and supporting pupil engagement with and exploration of these issues

  • understand extending teaching approaches that incorporate some of these values and ide
    Author(s): The Open University

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2.4 Obesity – an evolutionary perspective

If you were now to take a broader biological approach to the data discussed in the previous section you might still be puzzled. Excess body weight leads to a variety of diseases, including diabetes, osteoarthritis and so on – surely this must reduce overall biological fitness.

SAQ 21


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Licensing of Geograph articles
What users may or may not do with a Geograph article.
Author(s): Rudi Winter

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Civil Rights Tour
Join us as we revisit some of Civil Right's most poignant landmarks in Greensboro, North Carolina; Atlanta, Georgia; Birmingham, Montgomery, Selma and Tuskegee, Alabama; Memphis, Tennessee; and Cincinnati, Ohio. Meet and hear from folks who lived history. In view of the circumstances of the world today a reflection of the past struggles of the Greensboro Four, Rosa Parks, the Freedom Riders, Dr. Martin Luther King, Jr. and others who boldly took steps to ensure the rights of all Americans. This
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Working in the voluntary sector
This free online course, Working in the voluntary sector, will introduce you to some of the main activities carried out by volunteers and staff, will give you some background on how different organisations work and will provide you with knowledge and skills you can apply to your own work or volunteering, as well as to your every day life. First published on Thu, 11
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Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

11.432J Real Estate Capital Markets (MIT)
This half-semester course introduces and surveys the major public capital market real estate vehicles, REITs and MBS (with primary emphasis on CMBS). Some background is also included in basic modern portfolio theory and equilibrium asset pricing. This course is primarily designed to provide MSRED students with a basic introduction to the public capital market sources of financial capital for real estate, and how those markets value such capital investments.
Author(s): Geltner, David,McGrath, Tod

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to c
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Learning outcomes

After studying this course, you should be able to:

  • contrast the physical properties of air and water and describe implications of such differences for aquatic mammals

  • give examples of the adaptations displayed by aquatic mammals that enable them to hold their breath while submerged for relatively long periods

  • describe some of the biological differences between pinnipeds, sirenians and cetaceans

  • discuss the importance of communication
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Learning outcomes

By the end of this unit you should be able to:

  • explain correctly the meanings of the emboldened terms in the main text and use them correctly in context;

  • give a brief account of the history of the record industry;

  • describe the methods used for storing analogue audio recordings introduced in the main text, highlighting their technological aspects;

  • make informed judgements as to the quality of a sound recording through analysis of the a
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World War II: Occupation Of Germany - part 5/5
April 1945 The situation in post-war Europe including the allied occupation of Germany, demobilization, the Nuremburg trials and the genesis of the Cold War. The episode concludes with summations about the ultimate costs and consequences of the war. Interviewees include Charles Bohlen, Stephen Ambrose, Lord Avon, Lord Mountbatten and Noble Frankland.
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4.1 The advantages

On the basis of LoM and the TV programme, and hearing so much about African hunting dogs and lions, you might be tempted to believe that carnivores generally live in groups.

SAQ 9

Question: Do you think this genera
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Literary Festival 2016: Out of our Bodies: can we ever free consciousness? [Audio]
Speaker(s): Ned Beauman, Dr Kate Devlin, Professor Nicholas Humphrey | While social psychologists and cognitive scientists affirm that minds do not exist separated from biological and social systems, our human utopias have always dreamt of a disembodied, free-floating consciousness. William Gibson invented cyberspace in 1984 and blew our minds away in Neuromancer: for the young rustlers, digitally enhanced cowboys ‘jacked into a custom cyberspace desk that projected disembodied consciousness
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Porcelain Dental Veneers Mansfield

Video link (see supported sites below). Please use the original link, not the shortcut, e.g. www.youtube.com/watch?v=abcde

Author(s): JayHowell

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How the Iowa Caucus Works
Each U.S. primary election season kicks off in Iowa. Learn the process behind one of the pivotal events of the general election. (02:03)

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