Antarctic Species Tallied Up
New research has found that the Antarctic islands are home to a greater diversity of species than the Galapagos. This video is a slow loader. Provides a new look at this area that might provide students the opportunity to look at it differently. (01:06)

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2.3 Multiplying powers

Powers of ten can be used to investigate what happens when two powers of the same number are multiplied together. For example, consider multiplying 10 by 100:

A billion is a thousand million. In terms of powers this is:

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3.5 Muscle

There are different sorts of muscle in the body and they have different functions. Skeletal muscles are the muscles that, for example, are used for movement in your arms and legs.

Skeletal muscles store glucose as glycogen (Figure 4) and are able to use glucose as a fuel. Insulin stimulates muscles to take up glucose, and w
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Different Types of Arguments
The second of six lectures dealing with critical reasoning. In this lecture you will learn about the different types of arguments, in particular deductive and inductive arguments.
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The Prodigal Son
NEST Learning.com video, the Animated Stories of the New Testament, story of The Prodigal Son.  The Parable of The Prodigal Son (or the Parable of the Lost Son) is the tale of a wayward youth reunited with his father and family after having squandered all his inheritance through wasteful living. Learn of God's overwhelming love for those who humbly repent of their foolish ways with this endearing Bible story.  Cartoon format. (1:58)
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Economic Update: Economic Change, Economic Disorder
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Learning outcomes

After studying this course, you should be able to:

  • relate the temperature of a solid to the mean kinetic energy of its atoms

  • use models for thermally induced effects that involve linear, exponential and step changes

  • use exponentials, logarithms and graphical methods to interpret data from a thermally activated process in terms of Arrhenius's law

  • identify the changes of phase taking place in a variety of critical phenomena


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7.3 Frequency tables

So far you have looked at small sets of data, which are relatively easy to analyse. Naturally, this is not always the case and you need to consider how to work with a larger set of data. Data set B shows 30 TMA scores recorded by a tutor in the order that the scripts were marked.

Data set B:

86 78 93 <
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2.3.5 Mixed structures

Teams often have mixed structures:

  • some members may be employed to work full time on the project and be fully responsible to the project manager. Project managers themselves are usually employed full time.

  • others may work part time, and be responsible to the project manager only during their time on the project. For example, internal staff may well work on several projects at the same time. Alternatively, an external consultant workin
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7.2.8 Trust brokerage

This business model describes those companies or organisations who provide some service connected with security or trust. For example, as you will see later in the book, copyright is a major issue for the internet. A company might develop a sophisticated graphic which could easily be copied by another company that would then claim that they developed the graphic. A trust company might offer the facility for companies to register their work with them and then be able to testify to the date tha
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7.3 Studying protein–protein interactions

The investigation of protein–protein interactions is a very important aspect of understanding proteins. Identifying binding partners can give insight into a protein's function. Many different methods and technologies have been developed to identify and characterise interactions between proteins, a few of which are described here.


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1.5.3 Summary of Section 1.5

  1. Some annual plants and insects can spend the winter at juvenile stages, such as seed, egg, larva or pupa. Butterflies in Britain display a variety of juvenile overwintering strategies.

  2. Migration often results in high mortality, but completion of the journey results in higher breeding success, due to increased availability of food and fewer competitors.

  3. Birds increase their body mass, sometimes by up to 50%, prior to migration. T
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5.5.3 Plotters

A plotter is a special type of printing device mostly used by architects, engineers and map makers. Here the printed output is produced by moving a pen across the paper. Sometimes several differently coloured pens are available. Plotters are obviously most suitable for line drawings, which is why architects, for instance, use them. I've mentioned them here, however, because – in contrast with monitors and printers – they produce an analogue output directly.


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6.2.3 Groups

The large group portrait came to commercial prominence in the 1880s, probably as a result of the widespread introduction of dry plate negatives. These negatives could be bought ready made over the counter. They did not require immediate processing and they reduced exposure times significantly. The group portrait involved the production of a single negative and a potential sale to each member of the group. Customer costs were kept low without injury to the photographer's profits. School, work
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Activity answers

Study Note: As outlined in the text I have not provided answers to all Activities. This is for two reasons:

  1. For some activities only you can devise the answer and any I gave would be distracting or unhelpful.

  2. For others in-text answers are given.


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Keep on learning

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Eisenhower's Presidency-Domestic Concerns
This video is accompanied by text. "After the war-ravaged times of the 1940s and early 1950s, Americans turned their attention to domestic concerns. President Eisenhower's strong yet pleasant demeanor was the antithesis of Truman's cold scowl and helped usher in a more friendly and family-oriented era. While the Republican accepted much of the previous administration's New Deal, he also promoted policies that nurtured the growing economy. The philosophy of the Eisenhower administration—labeled
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5.10 Fluoridation

The addition of fluoride to water has caused much controversy and public debate. The problem seems to be that some see it as the addition of a poison, and others see it as the use of mass medication whether the individual wishes it or not.

Many waters do, however, have a natural fluoride content (Figure 33) and it has been suggested that the presence of fluoride in a concentration of 1.0 mg l−1 is beneficial in preventing dental decay. Above this concentration there is the
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