My final point in the preceding section brings home the fact that integer arithmetic is not really suitable when divisions are to be performed. It is also not suitable where some or all of the values involved in the arithmetic are not – or are not necessarily – integers, and this is often the case. In such cases, arithmetic has to be performed on non-integers.

The most common representation for non-integers is the floating-point representation that I mentioned briefly in Box 3. You
Author(s): The Open University

• Measured stellar masses range from about 0.08M to about 50M, with stars of lower mass being more common.

• Stars lose a rather small fraction of their masses during much of their lifetimes, but much larger fractions when they shed planetary nebulae, or when they undergo supernova explosions.

• When stellar masses are placed on an H-R diagram, and coupled with observations of mass loss,
Author(s): The Open University

Before 1929, the US government did not systematically attempt to moderate or reverse general business contractions. Recovery usually came about spontaneously within the
Author(s): No creator set

Multiplying Mixed Numbers
This video shows a teacher solving a multiplication problem containing mixed numbers.  The problem is solved step-by-step on a white board as the teacher explains each step. ( 1:09)
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The Dust Bowl Years
I was inspired to make this video after watching the History Channel's special presentation of "Black Blizzard" which described in depth how and why the Dust Storms of the 1930's happened. I knew the storms were bad, but in my wildest imagination I could never fathom the magnitude of destruction the phenomenon caused. How the people of the time made it through without going mad is truly astonishing. It is to the survivors and their families that I humbly dedicate this video.
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## Unit Question A

Foxes eat rabbits and rabbits eat dandelions. Predict what will happen if rabbit numbers are severely reduced (e.g. by disease). How confident are you about your predictions?

Author(s): The Open University

An Irish Christmas
In clear voice and high spirits, Kelly Kennedy sings Irish Christmas melodies.
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Many people spend a lot of time at home, they invest part of themselves within it, both materially and emotionally. So what does it mean?

### Activity 1: What does home mean?

1. The g
Author(s): The Open University

There is a lot of information available on health and lifestyle via the internet. Try the activity below to start exploring what is available.

## Activity

This section explores the events commemorated in photographs.

### Activity 19

Begin by listing the occasions when we choose to use our cameras today. It might help to think back over the times when you have used your
Author(s): The Open University

Although we each die only once, there may be many a brush with death throughout the course of a person’s life. The experience of having been close to death can have a major impact on the way in which a person continues living. For Elaine, the awareness that she might be about to die has affected the way she lives now that her prognosis is good. She describes herself as prepared for death and impatient of those who are not. She also has difficulty entering fully back into life.

Author(s): The Open University

Informal conversation with nature invokes intuitive ideas about human understanding and appreciation of value. The conversation develops practical ideas about how our entitlements affect our access to, and our relationships with, other constituents of the natural world. It also helps us to develop a sense of obligation towards the natural world. These less formalised aspects of responsibility are shaped by, and give shape to, the more codified rights and duties that provide guidance on our re
Author(s): The Open University

Labor migration researcher Dr Martin Ruhs discusses the often thorny questions around the rights of migrant labor versus access to work. With host Peter Mares.