Posts Tagged ‘Static Electricity’
The precautionary principle gone mad
Posted by: ozymandias1 on: March 23, 2010
This sign now seems to be appearing regularly in petrol stations across the country. Presumably it’s because the owners are afraid that the mobile can somehow cause a spark, even though there is not the slightest bit of evidence that this can happen. Maybe it’s related to the demonstration involving mobile phones cooking pop-corn. [...]
Secrets of the Van der Graff
Posted by: ozymandias1 on: October 20, 2009
The philosopher of science Michael Polyani referred to it as ‘personal knowledge’, sociologist of science Harry Collins called it ‘tacit knowledge’ and your local gardener would simply know it as ‘green fingers’. It is the knowledge which we possess as experts in any given field but which is difficult to articulate. A certain ‘je ne [...]
Fun with the Van der Graff and Animoto
Posted by: ozymandias1 on: May 1, 2008
- In: Education | Physics | Science | Static Electricity | youtube
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We had the usual fun with the Van der Graff today. The weather was rather accommodating, and it tallied nicely with the last class before the long weekend. I have never got a student’s hair to stand up dramatically, but i was drying the canvas belt with a hairdryer when I realised I could help [...]
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