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Learning outcomes

On completion of this unit you should be able to:

  • convert a vector from geometric form (in terms of magnitude and direction) to component form;

  • convert a vector from component form to geometric form;

  • understand the use of bearings to describe direction;

  • understand the difference between velocity and speed;

  • find resultant displacements and velocities in geometric form, via the use of components.


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4.5 Gamete production in women

It is time now to turn to the question of how female gametes – eggs – are made. There are substantial differences between sperm and eggs, and consequently their production pathways are very different.

Q Can you give one similar
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7 Useful web links

Children in Scotland's Policy Info Service, accessed 16 July 2008.

This website contains accessible, comprehensive and up-to-date policy information relating to children and young people in Scotland.

 

Department for Education, accessed 16 July 2008.

I
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7 Part 1: 6 Self-assessment questions

SAQ 1

Given the definitions you have learnt in Part 1, would you classify the following as an invention or an innovation?

  • (a) BIC ballpoint pen

  • (b) Flettner's rotor ship

  • (c
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4.5 Input and output considerations

In this final portion of Section 4, I shall look in outline at how text, moving pictures and sound can be input into a PC and output from it. I'll leave aside the possibility that the data has been obtained by buying a disk or downloading via the Internet and assume that the user is creating it.

I'll start by considering text, typed in at the keyboard. Pressing a key closes a contact and causes electrical current to flow. This enables the computer's keyboard input system to detect which
Author(s): The Open University

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1.3.1 Helices

A variety of helical structures can be identified in proteins using X-ray diffraction. A helix can be described by the number of units (amino acid residues) per turn (n) and by its pitch (p), which is the distance that the helix rises along its axis per turn. These parameters are indicated in Figure 8 for a number of helices
Author(s): The Open University

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2.2 The Church

The Scottish Church seems an unlikely place to look for the stirrings of enlightenment. In 1690, the General Assembly of the Church of Scotland passed an act against ‘the Atheistical Opinions of the Deists’, and, in 1696, an eighteen-year-old Edinburgh University student was executed for denying some of the propositions of Christianity. The legacy of the Scottish, Calvinist Reformation, it seems, was one of conformism, intolerance and narrow-mindedness.

But this is not the whole sto
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2.3.1 Geological mapping of coalfields

Coalfields can be divided into two categories: exposed coalfields, where the coal-bearing strata outcrop at the surface, and concealed coalfields, where they are hidden beneath younger rocks. Exposed coalfields can be defined with considerable precision by surface geological investigations; indeed geologists recording field data still represent the cheapest exploration ‘tool’ available to the coal industry.

In populated regions, the locations of coal outcrops are well
Author(s): The Open University

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3.5 Natural selection

Darwin summarised his theory of natural selection in the introduction to The Origin of Species as follows:

As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring struggle for existence, it follows that any being, if it vary however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life
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6.3 Summary

Taking the question of ideology seriously provides a way of developing beyond the limitations of the labelling perspective in studying the social construction of social problems in three main ways:

  1. Foregrounding ideology allows us to ask the questions: who says this is a social problem, and whose interests are being served by this definition? Looking at ideologies reminds us that the ways in which problems are identified and defined are neither obviou
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1 International human rights: an introduction

There are many examples of claims for rights in the international sphere.

One example was reported in September 2002. The British government was asked to make efforts to have a British man held by the Americans at Guantanamo Bay deported to Britain to face charges of terrorism there in connection with the attacks on 11 September 2001. Concerns were expressed about the denial of this man's human rights at Guantanamo Bay. Are alleged terrorists entitled to human rights? Can the denial of
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4.5.1 Filtering

Which of these senses do you usually tune out? From birth we start learning to filter information out and to prioritise, label and classify the phenomena we observe. This is a vital process. Without it we literally could not function in our day-to-day lives. In our work lives, if we did not filter information and discard options we would suffer from analysis paralysis: the inability to make any decision in the face of the complexity and the ambiguity of the real world.

However, t
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3.7 Protein phosphatases

Together with inositolphospholipid phosphatases, protein phosphatases are key regulators of signal transduction pathways. Like protein kinases, protein phosphatases are either tyrosine phosphatases (the majority of protein phosphatases, some of which are shown in Figure 44) or serine–threonine phosphatases (including the phosphoprotein phos
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The geological record of environmental change
This series of tracks looks at evidence of geological change in the field. Using examples in the UK and the USA they examine how geologists can map past activity from geological evidence. Material is taken from The Open University course S369 The geological record of environmental change. The iTunes U team. The iTunes U Team at The Open University prod
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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

Introduction

This unit covers a few key topics that will help you to think in broad ways about how you and others take decisions; we shall also introduce you to some themes in social science which have direct relevance to managerial decision making. The approach of this unit is descriptive: rather than prescribing how you should make decisions we look at frameworks that will help you to understand how decisions are actually made. We aim to help you to develop greater insight into both your own deci
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Counseling Manual for Caregivers, Nurses and Midwives

Content Type: 
Resource
Short Title/Course Code: 
Counseling Manual for Careg
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1.2.4 Places and spaces as resources

Attachment to places can be a resource within care relationships, especially where people have a shared history of attachment to places. An older couple may have experienced the ups and downs of moving between places together for much of their lives. Or a daughter may be caring for her mother in the home where she was born and brought up. A shared understanding of the home environment and the support which may be available locally can be invaluable in developing a care relationship. Such know
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2.1 Philosophy and science

We will consider some different attempts to answer the question ‘What is an emotion?’. Because we shall often need to refer to this question in what follows, I shall call it the ‘What is…?’ question. Before we investigate some of the ways in which philosophers have attempted to answer it, we should consider what an answer might look like.

What might a scientific answer to the ‘What is…?’ question tell us about emotion, for example, those offered by neurophysiologi
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Learn About the Phoenix Mars Mission
The Phoenix Mars Mission has a collaborative approach to space
exploration. As the very first of NASA's Mars Scout class, Phoenix
combines legacy and innovation in a framework of a true partnership:
government, academia, and industry. In this video we learn more about
this international mission.

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All About Astrology : The Sign Leo in Astrology
Leo is a confident and pretentious sign, get expert tips and advice on astrology, sun signs, and the zodiac in this video.
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