3.4 Self-assessment questions and problems

SAQ 13

Find |z| and Arg z in each of the following cases.

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    Climate change
    Climate change is a key issue on today's social and political agenda. This free course explores the basic science that underpins climate change and global warming. First published on Tue, 30 Oct 2018 as Climate change. To find out more visit The Open University's Author(s): Creator not set

    The science of nuclear energy
    This free course, The science of nuclear energy, will delve into the science behind nuclear power and explain what happens inside a nuclear reactor and what it means for an element to be radioactive. It will explore some of the risks of producing nuclear power and examine the arguments for and against including it in future energy planning as well as looking at other potential future solutions. Author(s): Creator not set

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    Eutrophication
    Managing eutrophication is a key element in maintaining the earths biodiversity. Eutrophication is a process mostly associated with human activity whereby ecosystems accumulate minerals. This free course, Eutrophication, explains how this process occurs, what its effects on different types of habitat are, and how it might be managed. First published on Mo
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    Understanding water quality
    Water is arguably the most important physical resource as it is the one that is essential to human survival. Understanding the global water cycle and how we use water is essential to planning a sustainable source of water for the future. In the UK there are areas where water supplies are limited, shown by recent droughts. Globally, there are many areas that do not have enough water to support the current population adequately. Decisions will have to be made on the best way to use water in a worl
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    Environment: treading lightly on the Earth
    Environment: treading lightly on the Earth focuses on the problem of greenhouse gas emissions, especially carbon dioxide. This free course will give you an understanding of the nature and importance of carbon footprints of individuals and households. It will enable you to measure your own carbon footprint and explore what you could do to reduce that footprint and so ‘tread more lightly on the Earth’.Author(s): Creator not set

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    Environment: understanding atmospheric and ocean flows
    What affects the atmospheric and ocean flows? This free course, Environment: understanding atmospheric and ocean flows, explores the mechanisms that are important; the most rapid carrier is the wind. The basic principle of global atmospheric circulation is simple: warm air rises and cold air sinks. How does this principle affect the atmosphere and flow of water in practical terms? Starting with an iconic environmental icon, the polar bear, you will learn how global flows of water, heat and
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    Animals at the extremes: Hibernation and torpor
    Hibernation is an ingenious adaptation that some animals employ to survive difficult conditions in winter. This free course, Animals at the extremes: Hibernation and torpor, examines the differences between hibernation and torpor, and discusses the characteristic signs of hibernation behaviour. It explores the triggers that bring on hibernation, and whether internal signals or external season cues are predominant. It also examines the physiological adaptations that occur in hibernating animals.
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    The oceans
    The oceans cover more than 70 per cent of our planet. In this free course, The oceans, you will learn about the depths of the oceans and the properties of the water that fills them, what drives the ocean circulation and how the oceans influence our climate. First published on Wed, 26 Jun 2019 as Author(s): Creator not set

    Waste management and environmentalism in China
    This free course, Waste management and environmentalism in China, is an introduction to waste generation and waste management processes currently being practiced in China. This course explores how the Chinese can deal with increasing volumes of waste, drawing parallels with the UK experience of waste management. It also discusses the conceptual tools that can be used to make the cycle of material use, waste production and treatment more sustainable. The course ends with a brief examination of th
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    Aquatic mammals
    Mammals come in a bewildering variety of shapes and sizes and yet all of the 4700 or so species have some characteristics in common, which justifies the inclusion of diverse types within a single group. Although mammals evolved on land, a number of species have become adapted to spending part or all of their lives in water and it is these mammals that you are going to concentrate on in this course. You will meet some aquatic mammals, find out how we can study them, consider their evolutionary hi
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    Can renewable energy sources power the world?
    We ask the question ‘Can renewable energy sources power the world?’ as a response to the growing awareness that increased use of renewable energy technologies is making a major contribution to global efforts to limit anthropogenic climate change. The course begins by examining the environmental concerns that have caused a rise in interest in renewable energy, introducing the main sources and technologies, and describing global efforts to increase the share of renewables. The course then look
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    Studying mammals: The insect hunters
    From pygmy shrews to armadillos, a wide range of mammals survive on a diet made up largely of insects. Many of these have fascinating adaptations suited to catching or rooting out their prey. In this free course, Studying mammals: The insect hunters, you will learn about these adaptations, along with survival strategies for when food is scarce. This is the second course in the Studying mammals series. Author(s): Creator not set

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    References

    Edwards, P. N. and Schneider, S. H. (2001) Self-governance and peer review in science-for-policy: the case of the IPCC Second Assessment Report, in Miller, C. and Edwards, P. N. (eds) Changing the Atmosphere: Expert Knowledge and Environmental Governance. Cambridge, MA: MIT Press. Available from: http://stephenschneider.stanford.edu/Mediarology/Mediarology.html (accessed 10 May 2007).
    IPCC (2000) Land Use, L
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    Keep on learning

    Study another free course

    There are more than 800 courses on OpenLearn for you to choose from
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    Conclusion

    This free course provided an introduction to studying Science. It took you through a series of exercises designed to develop your approach to study and learning at a distance, and helped to improve your confidence as an independent learner.


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    2.8 End of course question

    Question 12

    The writer and campaigner George Monbiot wrote the following (in The Guardian Weekly, 10 February 2000): 'Every time someone in the West switches on a kettle, he or she is helpting to flood Banglades
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    2.6.1 Weighing up the evidence: the full cast of suspects

    Figure 36 (again adapted from the TAR) takes your thoughts on Question 11 on a stage. It gives estimates of the cumulative effect since pre-industrial times of the various climate change agents, with the contributions expressed in terms of radiative forcing. Note that the figure also includes yet another device for communicating the IPCC's confidence in a particular finding - an indication of the 'level of scientific understanding' that accompanies each estimate. This reflects the authors' su
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    2.5 A 'collective picture of a warming world'

    The observed increase in GMST may be the key global indicator of greenhouse warming, but it is far from being the only tangible sign of climate change during the 20th century. This brings us back to the first bullet point at the beginning of Section 2.1. Here, we take a brief look at the growing body of evidence that many different climate variables, as well as physical and biological systems around the world, have been affected by recent climate warming. The examples collected in Box 9 will
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    2.4 The meaning of 'consensus': peer review and the IPCC process

    At the time of writing (2006), debate about the 'hockey stick' reconstruction continues to rumble on. In this and other controversial areas, it is natural that scientists who are not part of the IPCC process should scrutinise its assessments and continue to ask probing questions about its conclusions. At the same time, however, it's important to keep claims that run counter to the mainstream view in perspective - and to bear in mind that there may well be a political agenda behind the sele
    Author(s): The Open University

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