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2.3 Inverse proportion

In Section 2.2 you saw that direct proportion described relationships between two quantities, where as one increased, so did the other. Sometimes as one quantity increases the other decreases instead of increasing. This is called indirect proportion. Team tasks are often an example of this. The tim
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ALS Ice Bucket Challenge

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

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"Environmental Degradation and Deforestation in Thailand and Cambodia"
Alan Kolata is Neukom Family Distinguished Service Professor of Anthropology, The University of Chicago. There is little doubt that climate change, deforestation, erosion, and the unequal distribution of natural resources around the globe are of pressing importance everywhere, but these problems are perhaps most acute in Asia, home to 64 percent of the world’s population. Much of this population (1 and 1.3 billion, respectively) is concentrated in India and China, two countries with rapidly g
Author(s): The Center for International Studies at the Univer

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Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to choose from on a range of subjects. 

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3.1.1 Treatment or management?

In the preceding paragraph you will notice that we talked generally about the treatment of conditions, but referred to ‘managing’ dyslexia. Why did we do this? It relates to the following important general issues:

Is treatment (i.e. intervention) warranted? We mentioned this issue when we were discussing sociocultural or personal distress based definitions of abnormality. Intervention is not always desir
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Hoodwinked Teaches Potential and Kinetic Energy
Gravitational potential, elastic potential, and kinetic energy are all found here in the cartoon animated movie Hoodwinked.  Types of energy are pointed out at the bottom of the screen during various parts of the movie.  Several energy formulas are also provided throughout the video. CUTE cartoon animation integrated with key science content.  (09:02)
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COMP3218 Balance and Difficult
COMP3218 Balance and Difficult - UNSPECIFIED Keywords:comp3218 , game design
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2.8 Reference sourcing quiz

SAQ 1

1 When referencing an image what details should be included alongside the image?

  • A The URL of the image

  • B The file name of the image


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4.3.1 Start writing

Using the format of introduction, main body and conclusion outlined in Section 3, write up your answer to the question.


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Create vignettes for artistic effect
Learn how to use new options in the Effects panel to create postcrop vignettes that show off the content of your photos.
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2.5 Summary of Section 2 and questions

  • In an astronomical spectrograph light may be dispersed using either a prism, a reflective diffraction grating or a volume phase holographic diffraction grating.

  • The grating equation quantifies the amount by which light of different wavelengths is dispersed by a grating having a particular groove spacing.

  • In a spectrograph, light is first collimated before passing through the dispersive element, and then focused by a secon
    Author(s): The Open University

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Neighbourhood nature
There is a fascinating world of nature all around us which we can see if we know how to look for it. Wherever you live, be it in a city or the countryside, you will find areas that support a range of wildlife. This free course, Neighbourhood nature, will provide you with basic scientific and observational skills so that you can go into your local neighbourhood to discover the animals and plants in open spaces. You will learn how to observe, identify and record the wildlife around you, building u
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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

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Water and urban sprawl in the Tucson Metropolitan Area
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2.3.4 Using ‘quel’, ‘quelle’

You have already come across the following question:

  • Quelle est la date de votre anniversaire?

Quel means ‘what’ or ‘which’. It changes to quelle if the noun that it is linked to is feminine.


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Metamorphosis of Rana Catesbiana
Pictures of various stages of the life cycle of Rana catesbiana, showing characteristics of young tadpoles, the stages of transition and adult frog.

There is no narration, just music. (02:02)

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Spanish Listening Comprehension for Absolute Beginners #14 - Talking About Vacation Plans in Mexican
  Learn Mexican Spanish with SpanishPod101.com! Do you find yourself only understanding bits and pieces of Mexican Spanish conversations? Do you spend hours trying to figure out what that person said to you in Mexican Spanish? Then this Mexican Spanish Listening Comprehension for Absolute Beginners series is for you! In each lesson of this five-part series, [...]
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Archaeologists unearth 150 skeletons from medieval times found beneath a Paris supermarket, think they may have been part of a "mass mortality crisis" like Bubonic plague. Mana Rabiee reports. Subscribe: http://smarturl.it/reuterssubscribe More updates and breaking news: http://smarturl.it/BreakingNews Reuters tells the world's stories like no one else. As the largest international multimedia news provider, Reuters provides coverage around the globe and across topics including business, financ
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