8 Water and its impurities

Water must be of a certain quality to be suitable for human consumption. No natural water found on Earth is pure; any sample of water contains more than just water molecules. Some materials, such as sodium nitrate, are very soluble and dissolve in water in large quantities, whereas other materials are much less soluble. This is just as well, otherwise rain would dissolve all the rocks and they would end up in the oceans!

Drinking water must not contain harmful materials, which means bot
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Malaysia and Singapore: Models for the Asian Century?
Chaired by Basham Professor Anthony Milner from the ANU School of Culture, History & Language, this expert panel examines the question 'Malaysia -Singapore: Models for the Asian Century?' as part of the inaugural Malaysia-Singapore Update at The Australian National University. Both Malaysia and Singapore have had a long and close association with Australia in areas including economic cooperation, education, security and refugees. The longstanding governments of these two economically thriving s
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Oil tanker was hijacked by Libyan gunmen, captain says
Now held in a Libyan jail, the captain of an oil tanker -- said to have been seized by a group of armed fighters -- says he and his crew had no choice but to comply with the ship's captors. Jillian Kitchener reports. Subscribe: http://smarturl.it/reuterssubscribe More 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 busi
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7.90J Computational Functional Genomics (MIT)
The course focuses on casting contemporary problems in systems biology and functional genomics in computational terms and providing appropriate tools and methods to solve them. Topics include genome structure and function, transcriptional regulation, and stem cell biology in particular; measurement technologies such as microarrays (expression, protein-DNA interactions, chromatin structure); statistical data analysis, predictive and causal inference, and experiment design. The emphasis is on coup
Author(s): Gifford, David,Jaakkola, Tommi

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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

Introduction

Energy from sources other than fossil or nuclear fuels is to a large extent free of the concerns about environmental effects and renewability that characterise those two sources. Each alternative source supplies energy continually, whether or not we use it. Many alternative sources of energy have been used in simple ways for millennia, e.g. wind and water mills, sails, wood burning – but only in the last two centuries has their potential begun to be exploited on an industrial scale. Except
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A-Z HIV/Aids reporting practical guide
Published by the Kaiser Family Foundation, this practical guide which is intended for journalists provides information on HIV/Aids reporting for the media. The guide covers the basics of HIV/Aids reporting; tips on how to pitch stories to editors, and gives advice on ethical reporting. Lists are provided on additional resources with a glossary, a timeline of the history of HIV, FAQ, explanations utilised and details on treatments used for HIV/Aids. The last two chapters concentrate on TB and mal
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Hand Gestures, Kinect and Conversations

This inspirational project provides another view of how the Kinect might be used to extend and enhance communication and interaction (and as a "hand talker" myself I think it's just kind of cool :)

Kinect for Windows helps decode the role of hand gestures during convers
Author(s): Greg Duncan

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Rights not set

Kids Tell the Story
History is in the hands of Junior Interpreters all summer long, as the story of the Revolution expands to include a kid's perspective. Pam Blount tells us how sites involve children in the 18th century and today.
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Persoonsvorm - onderwerp : Werkblad
zinsleer.jpg

Met dit werkblaadje oefen je op het zoeken van de persoonsvorm en het onderwerp.


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Battle for Color TV I
If Peter Goldmark had had his way, television would never have been broadcast in black and white. (3:39)
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2.3.2 Geophysical methods — seismic surveying

Geophysical survey methods use measurements made at or near the Earth's surface to investigate the subsurface geology. The most widely used geophysical method is seismic reflection surveying; a rapid and highly cost-effective way of gathering data.

A seismic source (produced either by the explosive release of compressed air in a shallow borehole, or a heavy pad vibrated hydraulically at the surface) generates seismic waves that travel through the ground (
Author(s): The Open University

Online security debate after celebrity hacking scandal
Recently hacked phones of Hollywood celebrities spark privacy discussion. Julie Noce 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, financial, national, and international news. For over 160 years, Reuters has maintained its reputation fo
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Sunday Service Live - 5/18/14 - Carol Gregg
Sunday Service Live - 5/18/14 - Carol Gregg
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1.7.1 Carboniferous mires

During the late Carboniferous, mires developed over vast areas of the UK. Much of today's land area was an extensive, low-lying plain bordering a sea to the south (a sea that was soon to be the site of a mountain-building episode). Any mountains that existed lay hundreds of kilometres to the north. Large river systems meandered southwards across these plains.

At that time, the UK lay in tropical latitudes, almost on the Equator (see Author(s): The Open University

Química Orgánica para Ingenieros
La Síntesis Orgánica ha permitido la aplicación de la Química Orgánica a las necesidades humanas. Sus productos están presentes en todos los ámbitos de nuestra vida, desde los materiales que manejamos habitualmente a los fármacos y productos que mejoran nuestra calidad de vida. Son numerosos los campos en los que la Química Orgánica de Síntesis ha sido y es de especial importancia tanto desde el punto de vista económico e industrial como desde el punto de vista del tratamiento efecti
Author(s): María Jesús Blesa Moreno

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María Jesús Blesa Moreno

1 Geothermal energy

Although energy from the Earth's interior that flows though the surface is on average very low — about a thousand times less than the solar energy that falls on the surface — it is sufficiently abundant worldwide to make it locally worth exploiting. The top 3 km of the Earth's crust stores an estimated 4.3 × 107 EJ of thermal energy by virtue of the temperature of rocks and their thermal capacity. Because global consumption of energy during 2002 was 451 EJ heat stored within t
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7.1 Introduction

So far we have presented two pieces of evidence pointing to the occurrence of a big bang: the redshift of the galaxies (indicating the continuing expansion of the Universe), and the 3 K radiation (the remnant of the primordial radiation). But there is a third imprint such a big bang ought to have left on our present-day world. We cannot at this juncture trace out the full sequence of events following the instant of the big bang (that can only be done after we have worked through the next two
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Practicing Handwriting Using Air Writing
Student/Teacher Created Video- A student demonstrates how to use air writing to practice how letters are formed BEFORE using pencil and paper.  Sound is not clear. (3:06)
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Diabetes complications
Diabetes is an increasing problem among both adults and children. This free course, Diabetes complications, looks at the way the condition is managed once it has been diagnosed in order to reduce the risk of further complications. You will look at the role of each member of the team involved in the diabetes annual review and look at the risk factors involved with certain diabetes complications.Author(s): Creator not set

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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

Fresh gun battle near Karachi airport
A fierce gun battle erupts close to Pakistan's busiest airport in the city of Karachi, a day after militants stormed one of its terminals. Sarah Toms 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, financial, national, and international n
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