Nitrogen
Nitrogen is the most abundant element in Earth. Details different characteristics of nitrogen. Run time 04:20.
One Minute Romanian - flyer
From the makers of the award-winning online language course Coffee Break Spanish comes a new range of titles aimed at busy people who want to acquire the absolute basics of a language.
One Minute Languages from the Radio Lingua Network will introduce learners to a new language from scratch. The course is made up of ten lessons and covers topics including basic greetings, introducing yourself, and dealing with language problems. You’ll also learn numbers and other useful words and phrases whi
Delamination cracks in h-BN particles.
h-BN particles were subjected to compressive stress in the (0001) planes (within a silicon nitride particulate-reinforced silicon carbide composite). The occurrence of BN inclusions results from the introduction of colloidal BN into the hot isostatic pressing process. They are formed from B2O3 present as a thin surface film on the BN particles in the barrier layer. B2O3 will be molten during the pressing process and will diffuse rapidly into the powder compact and react with Si3N4 to form BN. Su
English Grammar: All About Phrasal Verbs!
If you want to "keep up" with other English students, you need to master phrasal verbs. In this lesson, how phrasal verbs work is explained using "keep up" as the main example. (16:51)
4.1 Conic sections Conic section is the collective name given to the shapes that we obtain by taking different plane slices through a double cone. The shapes that we obtain from these cross-sections are drawn below. It is thought that the Greek mathematician Menaechmus discovered the conic sections around 350 bc. Conclusion This free course provided an introduction to studying Mathematics. 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. 3.051J Materials for Biomedical Applications (MIT) Frink - Boar DP178250 Boar (1970) by Elisabeth Frink, The Water Gardens, Harlow, Essex. Detail view from the south east. Photographed by Steven Baker 2015. Images of Earth and Space II Introduction to differential equations 1.3.10 Summary There is a lot of information available on Modern Languages via the internet. Try the activity below to start exploring what is available. Use the Author(s): 2.2.2 Collimator The dimensions of the emerging X-ray beam can be altered by the collimator. This helps to ensure that only the region of interest is exposed to the X-rays. Understanding Cities 6.1.3 Ensuring safety Ensuring that a user can't choose a wash temperature that's too hot for the ‘hand wash’ programme is an example of ensuring safety. In other words, the washing machine microcomputer is trying to prevent the user making choices that are not sensible. Of course, I could put a load of delicate washing in and choose the ‘cotton’ programme which has a temperature of 90°C. The computer program controlling the machine has no way of knowing that I've put silks or woollens in and not c 2.5 Clusters A striking contradiction of the internet revolution is that, although cyberspace allows firms to be located anywhere, they still seem to cluster together in global cities such as New York, London and Sydney (Castells, 2001). Four years after publishing a book proclaiming The Death of Distance, Frances Cairncross noted in the book's second edition that, ‘Economists, most of whom have long ignored or despised economic geography, are now taking a fresh interest in it’ and, after revie Sea Urchin Development 4.4.1 Diversion of effluent In some circumstances it may be possible to divert sewage effluent away from a water body in order to reduce nutrient loads. This was achieved at Lake Washington, near Seattle, USA, which is close to the sea. Lake Washington is surrounded by Seattle and its suburbs, and in 1955 a cyanobacterium, Oscitilloria rubescens, became dominant in the lake. The lake was receiving sewage effluent from about 70 000 people; this input represented about 56% of the total phosphorus load to the lake. NSIPP: North America Water Vapor and Soil Moisture Celebrating 15 Years of Metamaterials 2.5 Summary of Section 1 England, Scotland and Wales are nations. Wales was conquered by the English in 1282 and its parliamentary union with England took place in 1536. The United Kingdom of Great Britain was formed by the Act of Union of 1707, although the term Great Britain had been in use since 1603, when James VI of Scotland became James I of England (including Wales). Later unions created the United Kingdom of Great Britain and Ireland and,
This class provides an introduction to the interactions between cells and the surfaces of biomaterials. The course covers: surface chemistry and physics of selected metals, polymers, and ceramics; surface characterization methodology; modification of biomaterials surfaces; quantitative assays of cell behavior in culture; biosensors and microarrays; bulk properties of implants; and acute and chronic response to implanted biomaterials. General topics include biosensors, drug delivery, and tissue e
© Historic England
This videotape tours the Solar System and outer space using scientific visualizations from Goddard Space Flight Center, Jet Propulsion Laboratory, and the HPCC Earth and Space Sciences Project. At the Sun, simulations investigate processes that create magnetic field and release energetic particles. Earth science begins with the Pacific Ocean, studying the 1997-98 El Nino and Cyclone Susan. Crossing the globe, visualizations trace North Americas East Coast and ocean currents in the North Atlantic
Differential equations are any equations that include derivatives and arise in many situations. This free course, Introduction to differential equations, considers three types of first-order differential equations. Section 1 introduces equations that can be solved by direct integration and section 2 the method of separation of variables. Section 3 looks at applications of differential equations for solving real world problems. Section 4 introduces the integrating factor method for solving linear
Activity 1
A short introduction to this album.
This article describes set-up and maintenance of marine aquaria for maintaining sea urchins and procedures for the study of developmental biology of sea urchins from fertilization to pluteus larva.
An animation of atmospheric water vapor and soil moisture from December 1999 through June 2000 for North America from the NSIPP global climate model
In 15 years metamaterials has brought breakthroughs like invisibility cloaks, acoustic cloaks, miniaturized flat antennas, and you-don’t-have-to-stop-anymore airport security screenings. Watch as two of the field’s founding fathers reminisce about their journey and look forward to the future. Metamaterials pioneers David R. Smith of Duke University’s Center for Metamaterials and Integrated Plasmonics and Sir John Pendry of Imperial College London discuss the birth, evolution and future of
