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Discovering chemistry Badge icon
Science, Maths & Technology

Discovering chemistry

...aluminium, (b) sodium, (c) sulfur, (d) bromine, (e) chlorine, (f) copper. Note that sodium is extremely reactive and as shown here, it is kept under oil to prevent reaction with air or water What is the state of matter of each of the elements shown in Figure 1.2? Answer Aluminium, sodium, sulfur and copper are solids. Bromine is a liquid and chlorine is a gas. So at this...
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Level 1: Introductory 24 hrs
‘There Were Four of Us’
History & The Arts

‘There Were Four of Us’

...Sands. A young Timothy Spall as a frankly unhinged John Polidori completes the quintet. An interview with the actress Myriam Cyr, in which she talks about playing the role of Claire Clairmont in Gothic: Transcript As with any Russell film, an already dramatic scene is heightened further by the performances and mise-en-scène. Cyr’s curly hair is teased into a huge halo...
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Article 5 mins
Night sky puts on a meteor shower to celebrate Rosetta’s closest approach to the sun
Science, Maths & Technology

Night sky puts on a meteor shower to celebrate Rosetta’s closest approach to the sun

...sand grains that travel through the atmosphere, about 50 miles above the Earth’s surface. They move fast – some 20-30 kilometres per second – and friction between the particle and the atmosphere at that speed causes them to heat up, emitting light. The grains aren’t burning up, they are evaporating into a plasma, which exists for a split second, before...
View article Night sky puts on a meteor shower to celebrate Rosetta’s closest approach to the sun
Article 5 mins
Ratio, proportion and percentages
Science, Maths & Technology

Ratio, proportion and percentages

...sand and cement in the ratio three to one’. This means If you have 30 kg of cement, then you need 90 kg of sand. The conversion rates between currencies or different units are often easier to remember as ratios. Many people remember that the ratio of distance in miles to the same distance in kilometres is five to eight. Example 1 At the time of writing the ratio of...
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Level 1: Introductory 5 hrs
Studying mammals: The insect hunters
Nature & Environment

Studying mammals: The insect hunters

...sand'. Another group of insect eaters are the elephant shrews. You might recall these animals from the TV programme looking like large versions of true shrews, with their 'path-tidying habit' captured on surveillance camera. Many taxonomists now argue that elephant shrews are sufficiently different from insectivores (and closer to rabbits and hares) to warrant being...
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Level 1: Introductory 10 hrs
Why are the Paris attacks given greater attention than the ISIS killings in Beirut?
Society, Politics & Law

Why are the Paris attacks given greater attention than the ISIS killings in Beirut?

...cast as ‘other’ European right-wing parties increasingly gain political ground on a strong anti-migration rhetoric that can be characterised as xenophobic, perhaps even racist. The message is clear: you do not belong here and have to go back where you came from. This, as hundreds of thousands of refugees flee into Europe. The European refugee crisis is also in fact a...
View article Why are the Paris attacks given greater attention than the ISIS killings in Beirut?
Article 5 mins
Methods in Motion: Communicating a challenge to liberal democracy
Society, Politics & Law

Methods in Motion: Communicating a challenge to liberal democracy

...caste] – referred to, and so amplified the idea that, various supposedly separate political and economic elites, such as politicians, bankers, judges, journalists (etc.) - were all part of the same regime established after Franco who have shifted power back and forth between themselves*. The economic crisis was portrayed not as a crisis but as a ‘scam’ or...
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Article 5 mins
Desert Island Discs at 75: An OpenLearn listening list
History & The Arts

Desert Island Discs at 75: An OpenLearn listening list

...casting away - on the side of NASA spacecraft: We thought over a thousand million years there was some chance that some other species of space-faring civilisation might have come upon this ancient, derelict, primitive ship and heave to, and wonder who had made it. So attached to each space ship is a phonograph record. A metal disc with instructions for use written in what...
View audio Desert Island Discs at 75: An OpenLearn listening list
Audio 10 mins