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When Nature Fights Back: Earthquakes
This video shows the devastation of earthquakes. It examines some of the most powerful earthquakes and their aftermath. (52:19)
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Greene King
This is the corporate website of Greene King, a Suffolk company which has been brewing beer and operating pubs for over 200 years. Its website has information about its products, which include Old Speckled Hen, and the brewing process, as well as details about its chain of pubs and hotels, visitor centre, news and financial information, with links to its various microsites.

The Investor Relations microsite contains a history of the company, financial reports dating back to 2000 and results
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2 Definitions: energy, sustainability and the future

What do we mean by energy and sustainability, and what is meant by future?

The term energy has a long history but the standard scientific definition today is that energy is the capacity to do work. The term power is related to energy and its definition is power is the rate of doing work. The two are linked together by the simple formula

energy = power x time

The term sustainability is not so simple to define but there is perhaps no better d
Author(s): The Open University

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Watch an Amoeba Swim
Watch an amoeba swim in this video. The image has been enhanced to highlight cell contents. The video does not include audio.  (03:29)
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7 Things We Don't Know About the Ocean
The ocean covers 70% of the planet, but humans still don’t know very much about it. In this episode, Hank discusses seven mysterious ocean topics. Hosted by: Hank Green (10:30)

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Arthritis Research UK
Arthritis Research UK (formerly known as the Arthritis Research Campaign) is the leading charity in the fight against all forms of arthritis. The charity funds high quality research, educates and informs the public and health professionals on all aspects of the condition, and campaigns for better treatment and support for all those living with arthritis. The website contains a wealth of information including: information on various musculoskeletal conditions, including the different types of art
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Pakistan link
Pakistan Link is a very useful site for those interested in Pakistani current affairs, culture, religion society, economics and politics. The site is targetted at the Pakistani community in the United States, but is of interest to scholars of diasporic communities and to those of Pakistani origin around the world. There are a large number of news articles presented on the site, alongside which are also commentaries on cultural events, arts, education and Pakistani society. The site is updated wi
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3.1 Lifestyle choices

Health is generally considered to be the absence of disease. However, the absence of any symptoms of disease may cause us to mistakenly believe we are healthy. We can't see inside our arteries to know how blocked up they are with fatty deposits without specialised equipment, but that doesn't mean it isn't gradually happening.

You may consider that your heart is healthy. What are your chances, as a member of the general population, of developing cardiovascular diseases now, next year or
Author(s): The Open University

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E Simultaneous equations

Simultaneous equations are pairs of equations that are both true (i.e. they are simultaneously true). They are both expressed as equations with two unknowns. By making one of these unknowns the subject of both equations, we can then substitute the subject in one equation and then solve for the other unknown. Then we can substitute back into the equation and solve for the subject.

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PSYC 106 - Lecture 18 - 11/30/2010
PSYC 106 - Lecture 18
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Metal hammer
Metal hammer is the online version of the heavy metal music magazine, Hammer. Subscription details for the print version are available, along with details of how to order back copies. The website, which is regularly updated, is searchable and features the latest news, reviews, tour dates, competitions and interviews; some interviews are available as videos and there are also a number of podcasts available. Software is required to access these features. Additional features include an A to Z of ar
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Archives of Maryland online
This website, the Archives of Maryland Online, 'provides access [as of October 2009] to over 471,000 historical documents that form the constitutional, legal, legislative, judicial, and administrative basis of Maryland's government'. The simple to use website is split into several subcategories (including, but not limited to, slavery commission, session laws, fiscal records, judicial records, constitutional records, and so on) aims to provide researchers, scholars and interested amateurs with t
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5 Example of a straightforward subtraction

In the example below of a straightforward subtraction, in every column the digit at the top of the column is bigger than the digit at the bottom. Click on each step in turn to see how to carry out the calculation.

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