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Special relativity
This is a page by David Waite that explains relativity theory at an advanced level. It is focused on special relativity. It warns that the reader must have a good understanding of algebra and calculus. It provides a link to a general relativity page from the same author.
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PAZAR
The PAZAR database unites independently created and maintained data collections of transcription factor and regulatory sequence annotation. PAZAR permits the representation of diverse information derived from experiments ranging from biochemical protein–DNA binding to cellular reporter gene assays. Data collections can be made available to the public, or restricted to specific system users. The system facilitates the analysis of genomics data and the creation of predictive models of gene regula
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3.5.2 Bacteria

Bacteria are organisms of special significance to the study of clean and polluted waters because they break down organic matter. While most of them are not harmful to humans, some bacteria (e.g. Clostridium) are pathogenic. Most bacteria are retained on a filter of pore size 0.45 μm and all bacteria are trapped on a filter of 0.22 μm. They are important in sewage treatment, and in solid waste disposal. They are extremely abundant in almost all parts of the aquatic en
Author(s): The Open University

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Copyright © 2016 The Open University

Institutul naţional pentru studierea Holocaustului din România
The website 'Elie Wiesel' National Institute for the Study of Holocaust in Romania (INSHR) reflects the activities of this research institute founded in 2005 in Bucharest, Romania. The website is in Romanian with a good but incomplete English version. The site presents the aims of the institute of collecting information about the Holocaust but also of disseminating the research results by creating learning materials for teaching. The section on publications introduce the monographs and testimoni
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5 Example of a straightforward subtraction

In the example below of a straightforward subtraction, in every column the digit at the top of the column is bigger than the digit at the bottom. Click on each step in turn to see how to carry out the calculation.

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