419 search results

The Silver Bridge Disaster: Stresses and strains
Science, Maths & Technology

The Silver Bridge Disaster: Stresses and strains

...carbon, heat-treated steel which, presumably, he thought meant that you could build a less substantial structure. Undoubtedly he expected lower ‘live’ loading than in Pittsburgh. But each bridge was a much longer span and so the loads at the tops of the chains in the towers would have been greater than in the bridges in Pittsburgh. The towers themselves were less...
EU Referendum - Economy
Society, Politics & Law

EU Referendum - Economy

...carbon emissions restrictions and safer banking regulations in a way that the UK on its own might not. The union also prevents the effectiveness of member states’ policies being blocked by the actions or inactions of other European countries, through coordination in the many areas where decisions by one country (or the big businesses based in it) have cross-border...
Life in the Palaeozoic
Nature & Environment

Life in the Palaeozoic

...carbonate about 0.2 mm across, found in late Precambrian strata about 550 Ma old. The unknown organisms that produced them were living at the same time as the Ediacaran fauna. SAQ 1 What, in general, was different about the size of fossils with hard shelly parts in the earliest Cambrian, compared with late Precambrian life such as the Ediacaran organisms? Answer The...
Level 1: Introductory 12 hrs
Practising science: Reading the rocks and ecology
Science, Maths & Technology

Practising science: Reading the rocks and ecology

...carbonate (CaCO3). Whereas most minerals are identified on the basis of physical characteristics (density, hardness, colour, etc.) calcite can also be readily identified with a chemical test. Calcite reacts with dilute hydrochloric acid, liberating bubbles of carbon dioxide (CO2) gas in a vigorous fizzing froth. The chemical reaction is written as In words, this equation...
A year in review 2022
Education & Development

A year in review 2022

...due to pay and patient safety concerns, and U.S. scientists made a major nuclear fusion breakthrough after 70 years of trying, revitalising hopes for unlimited zero-carbon energy in the future. New to OpenLearn: The Byzantine icon – a free course as interesting as the title sounds! And Putting the child before the player, an interactive about football for children....
Life as a Railway Worker: An Oral History Testimony by Nan Zaimaitas nee Lamont
Society, Politics & Law

Life as a Railway Worker: An Oral History Testimony by Nan Zaimaitas nee Lamont

...carbon monoxide poisoning, seriously affecting the way he could perform his work never mind his general health. Challenging Perspectives: a Woman’s Place… Later, I was the first woman to be given the opportunity to sit on the ScotRail Company Council. At the first meeting I attended I saw the men looking sceptical at idea that a woman would be best able to represent...
How to read a rock
Science, Maths & Technology

How to read a rock

...carbon), and sulphur found in volcanoes. Most minerals though, are compounds, i.e. different combinations of different elements, just like words are various combinations of different letters. The mineral quartz (SiO2) is quite a simple word, just made up of the elements silicon (Si) and oxygen (O). Transcript The mineral garnet is much more complicated and can have...
Engineering: The nature of problems
Science, Maths & Technology

Engineering: The nature of problems

...Carbon-fibre composite 500 200 60 1100 454 181 54 Magnesium-based alloy 300 300 45 1780 176 176 25 You can see the great potential for carbon-fibre composites and the strong competition between the other frame materials, particularly for the deflection-based index E/ρ. However, there are three major limitations that need consideration before we all go out and start...