Multiplying a number by itself is called squaring it and there is a key on scientific and graphics calculators which does this. On the TI-84 the key is marked .

Author(s): The Open University

Here are a few points from the Exercise 1:

• The negative or minus sign for the answer âˆ’2 maybe slightly smaller and higher than the one used for subtraction in 5 âˆ’ 7. There maybe two minus keys on your calculator keypad, as there are on the TI-84. The one which means do the operation subtract is Author(s): The Open University

Some calculators, like the TI-84, provide you with several different screens for menus, drawing graphs, writing programs and so on. The most important screen, where calculations are carried out, is called the Home Screen. If you should find yourself trapped on another screen, the â€˜panicâ€™ buttons to return â€˜homeâ€™ are usually one or other of the following:

Author(s): The Open University

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.

Author(s): The Open University

By the end of this unit you should be able to:

• Understand the problem of green-house gas emissions;

• Explore what you can do as an individual or household to lighten those emissions;

• Identify how much you would need to reduce your carbon footprint to achieve an environmentally â€˜sustainableâ€™ level of emission.

Author(s): The Open University

Several pieces of legislation make the preparation of emergency plans a statutory requirement. The European Directive on the control of major accident hazards (Council of the European Union, 1996a), the â€˜Seveso II Directiveâ€™, outlines the planning requirements for industrial sites with large inventories of hazardous substances. In the UK, the requirements of this directive have been incorporated into the Control of Major Accident Hazards Regulations (Health and Safety Executive, 1999a). I
Author(s): The Open University

Captain James Lovell chose the title â€˜A successful failureâ€™ for an article on the Apollo 13 Lunar Mission. The failure was that the lunar landing was abandoned. The success was that, although an explosion blew a gaping hole in the spacecraft three-quarters of the way to the moon and knocked out the electrical systems as well as the service module's engine, the three astronauts returned safely to Earth. Can you think of a better example of the value of emergency planning?

Two feature
Author(s): The Open University

Remember that in Section 4 I suggested that possible reasons for studying religion could be clustered together under two broad headings:

1. to understand the society in which we live, the culture we inherit and the wider world of which we are a part;

2. as part of a personal quest for religious
Author(s): The Open University

The tendency within religious behaviour to set things apart from the everyday does not just apply to time and place but also to ideas of authority (leaders and texts), to beliefs more generally, to institutions and to aspects of behaviour as, for example, in dress and diet. In fact, the concept of â€˜religion/religiousâ€™ is often set over and against the concept of the â€˜temporalâ€™ and the â€˜secularâ€™, which both suggest an outlook that is concerned solely with this world, the here and n
Author(s): The Open University

## Activity 4

Two questions:

1. What was east of Nazi-occupied Poland?

2. On what would this new resettlement depend?

### Author(s): The Open UniversityLicense informationRelated contentExcept for third party materials and/or otherwise stated (see terms and conditions) the content in OpenLearn is released for use under the terms of the Creative Commons Attribution-NonCommercial-Share

This unit is designed to develop the analytical skills you need for a more in-depth study of literary texts. You will learn about rhythm, alliteration, rhyme, poetic inversion, voice and line lengths and endings. You will examine poems that do not rhyme and learn how to compare and contrast poetry.

This material is from our archive and is an adapted extract from Approaching Literature (A210) which is no longer taught by The Open University. If you want to study formally with us,
Author(s): The Open University

This unit provides an overview of John Napier and his work on logarithms. It discusses his approach to this lasting invention and looks at the key players who worked with him, including Briggs, Wright and Kepler.

This unit is from our archive and is an adapted extract from Topics in the history of mathematics (MA290) which is no longer taught by The Open University. If you want to study formally with us, you may wish to explore other courses we offer in
Author(s): The Open University

The aim of this unit is to enable you to get started in Latin in a fairly leisurely but well-focused way. The material has been developed in response to requests from students who had had no contact with Latin before and who felt they would like to spend a little time preparing for the kind of learning which takes place on a language course â€“ and, in particular, on a classical language course.

If you have taken Classical Studies courses in the Open University or elsewhere, you will be
Author(s): The Open University

For an advanced general introduction to the philosophy of language, see Blackburn 1984. Lycan 1996 is pitched at a more accessible level. Pinker 1994 is an informal but informative discussion of the hypothesis that much of our linguistic ability is innate, an important topic that has had to be left out of this unit.

Author(s): The Open University

In addition to acquiring greater access to general practitioners in the late nineteenth and early twentieth centuries, poor patients also received more medical help from the outpatient departments of charitable hospitals and dispensaries. Hospital outpatient departments were an increasingly popular source of care: between 1860 and 1900, the number of patients attending the outpatient department of the London Hospital increased from 25,000 to 220,000. By 1910, there were 1.75 million attendanc
Author(s): The Open University

The more you write, the more you will raid your own past. These incursions won't diminish or reduce your memories â€“ rather those recollections can be enriched and become more fully realised. As Jamaica Kincaid says of her writing:

One of the things I found when I began to write was that writing exactly what happened had a limited amount of power for me. To say exactly what happened was less than what I knew happe
Author(s): The Open University

Silver and golden wedding anniversaries were often commemorated with a portrait. Many examples follow the pattern of the studio portraits taken for engagements and weddings, with the couple taken individually and together.

Author(s): The Open University

Of all rites of passage celebrated in the Victorian family album, those taken at the time of engagement and marriage are by far the most numerous. This testifies to the importance vested in marriage by the Victorians. The custom of commissioning oil or miniature portraits at the time of an engagement or marriage was well established before the advent of photography. Photography enabled couples on more modest incomes to indulge a practice that became widespread among working-class families by
Author(s): The Open University

Social historians have long argued that we must study history â€˜from the undersideâ€™, if we want to thoroughly understand a society. In other words, it is not sufficient to have a top-down knowledge of a society's institutions and politics. We need also to examine how ordinary, â€˜unimportantâ€™ people operate within a culture: what influences them and what they can (and cannot) influence; how they see their role in society and how others see it. The outsider view is the view from the outsi
Author(s): The Open University

Some themes recur when we start to think about religion. These include issues of continuity and change, representation, differing perspectives, authority, community and identity. In this unit we start to consider some of them in detail.

The full list of themes and issues considered in this section are:

• Continuity and change

• Representation

• The Victoria and Albert Museum 'Sacred Spaces' exhibition of 2000

• Author(s): The Open University