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Monthly Archives: April 2010
Dirty Lightning
Update: More pictures of dirty lightning, from the eruption of Eyjafjallajökull in Iceland. Update: Mount Redoubt erupted recently, causing dirty lightning. One of the recent eruptions of the Chaitén volcano caused a phenomenon called dirty lightning. The enormous release of smoke caused a … Continue reading
How to make nicer graphs in Microsoft Excel
I really hate it when I’m presented with a graph like this one: It’s instantly recognisable as one created in Microsoft Excel. For some reason the default settings in Excel produce some of the the ugliest graphs I’ve ever seen. Step 1 — Fix … Continue reading
Tagged graph
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Eyjafjallajökull erupting
In this imagery from NASA’s MODIS satellite [previously] you can clearly see the start of the ash plume from the Eyjafjallajökull volcano towards the bottom of the image.
Tagged ash, iceland, volcano
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Probability and the Grand National
Entropy is a very important concept in physics. When I was taught about entropy it was always related to probabilities, and the problem sheets we did often featured betting, horse races, greyhounds, etc. All this came back to me this … Continue reading
Tagged entropy, probability
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How big is your telescope?
I love the way that scientific institutions name telescopes. It started with the “large” telescopes like the Large Binocular Telescope (LBT), an 11.4-metre telescope (made up of two 8.4-metre mirrors) in the Pinaleno Mountains of Arizona; the Very Large Telescope (VLT), … Continue reading
Demographics and subject choice
What does your choice of A Level subjects say about you? Could I work out what sort of school you went to, based on your choice of A Levels? The DCSF publishes figures on the uptake of A Level courses. It … Continue reading
Tagged statistics
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