6.2.4 The speed and direction of the Earth's motion

The first significant claim to have detected the motion of the Earth relative to the ‘frame of isotropic 3 K radiation’ came in 1977 from a group at Berkeley, California. They concluded that the Earth is moving at a speed of (390 ± 60) km s−1, in a direction towards the constellation Leo, relative to a frame in which the 3 K radiation is isotropic. Their conclusion resulted from observations of a variation of intensity with angle of the form predicted by Equation 14, which w
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

GLS 2010 highlights
Highlights of London Business School's Global Leadership Summit 2010, held on 5 July. The theme was emerging markets: "New Frontiers: Expansion, Opportunity and Innovation."

Newsreel - Kennedy Inspects Missile Center [11-18-1963]
News broadcast of President Kennedy viewing a missile launching demonstration at an Air Force base in Florida.
Author(s): No creator set

License information
Related content

Fe, C 1.0 (wt%), hypereutectoid alloy
This secondary electron SEM image shows the cementite delineating prior austenite grain boundaries with a thin layer. The amount of proeutectoid phase is very low, with the majority of the area being taken by the pearlite eutectoid. Again each pearlite cell has a different orientation with the ferrite phase being selectively etched.
Author(s): DoITPoMS, University of Cambridge,Prof T W Clyne,

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Ernst Chain Prize and Lecture 2006 - The T cell-virus interface
Professor McMichael describes the T cell-virus interface and explains his influential contributions in the field of human immunology, particularly looking at viral infections and their interactions with T cells .
Author(s): No creator set

License information
Related content

1.2 The formation of NHS trusts

Figure 2.6

LSE IQ Episode 24 | How can we age better? [Audio]
Speaker(s): Professor Hiroko Akiyama, Kath Scanlon, Dr Thijs Van Den Broek, Professor Alan Walker | We hope you're enjoying this year's programme of public events and that you'll stay tuned for the exciting events we have lined up, for the summer term. In the meantime we have another podcast series we think you might enjoy. LSE IQ is an award-winning monthly podcast in which we ask some of the smartest social scientists - and other experts - to answer intelligent questions about economics, polit
Author(s): No creator set

License information
Related content

Introduction

An essential aspect of maintaining the body is the consumption of food. The range of foods that we eat is known as our diet and the components of food that are digested, absorbed and used in bodily functions are known as nutrients. Nutrients supply the body with both energy and with the components for growth and repair. In this free course, Obesity: balanced diets and treatment, you will examine the various roles of nutrients within the body and look at the effects of nut
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

History of American Literature Transdentalism
This program that explores the work of of famous American Authors in history.  Transcendentalism is explored in American literature before, during, and after the civil War.  
Author(s): No creator set

License information
Related content

3 Hot dry rock (HDR) fields

Heat flow through some parts of the continental crust can be well above normal locally because the underlying rocks contain abnormally high concentrations of uranium, thorium and potassium, which generate considerable heat. To add significantly to surface heat flow and thereby create high-temperature anomalies at shallow depths requires a large volume of such radioactive rocks. This condition is satisfied by some, but not all, granitic igneous intrusions, whose original magma became ch
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

COMP1216 - Problem class 8
COMP1216 - Problem class 8 - Profile Picture Prof Michael Butler
Author(s): No creator set

License information
Related content

The Genius of Archimedes - Part 5
NOVA explores Archimedes' rare writings, as well as the book's mysterious beginnings, tumultuous history and amazing discovery. As the ancient text comes back from the dead, it unlocks its revolutionary contents—the infinite secrets of one of history's greatest thinkers. (Part 5) Run time 08:39.
Author(s): No creator set

License information
Related content

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 know
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

2.4 Modern mine planning

Once the geological data gathered during the exploration phase has been evaluated, geologists will estimate the quality and quantity of coal present. Coal reserves (in tonnes) are calculated from volume × density (Section 5). The volume of coal is controlled by seam area and seam thickness.

Hence:

tonnage = seam area × se
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

1.1 Introduction

There are many environmental reasons why coal is a rather undesirable source of energy. Burning it introduces large amounts of gases into the atmosphere that harm the environment in a variety of ways, as well as other, solid waste products. Coal extraction leads to spoil heaps and mines that scar the landscape, land subsidence that affects roads and buildings, and in some cases water pollution.

With apparently so little going for it, why do we rely so much on coal to meet our energy nee
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

2.6 Underground mining

Coal extraction is of course less straightforward using underground mining techniques. The associated costs are higher, and these begin with the sinking of two shafts, an 'upcast' and a 'downcast' shaft for ventilation (Figure 22). Sinking these to a depth of a kilometre may take a few years and during this time,
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Learning outcomes

After studying this course, you should be able to:

  • explain the principles that underlie the ability of various natural phenomena to deliver solar energy

  • outline the technologies that are used to harness the power of solar energy

  • discuss the positive and negative aspects of solar energy in relation to natural and human aspects of the environment.


Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Supporters of traditional marriage rally in Washington
Thousands who support traditional marriage gathered in front of the U.S. Capitol to march to the Supreme Court ahead of this week's hearing on gay marriage. Rough Cut (no reporter narration). Subscribe: http://smarturl.it/reuterssubscribe More updates and breaking news: http://smarturl.it/BreakingNews Reuters tells the world's stories like no one else. As the largest international multimedia news provider, Reuters provides coverage around the globe and across topics including business, financi
Author(s): No creator set

License information
Related content

1.1 How has the human population grown?

For most of human history there have been relatively few people in the world. Figure 2 shows that only over the last 50 years have numbers really shot up, and that, at the turn of the century, the population reached over six billion.

Figure 2Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University