- This topic has 21 replies, 8 voices, and was last updated 7 years ago by
Nick Mitchener.
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16 June 2015 at 20:21 #12608
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16 June 2015 at 20:23 #12609
Perfect pace and delivery.
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16 June 2015 at 20:25 #12610
Thanks for the video, im not a physics specialist. Since you mentioned you used it when teaching year 12’s and 13’s, I will never teach a level physics. Is there a use for it somewhere in the gcse specification?
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16 June 2015 at 20:27 #12611
Hi Priya you could use it to describe things like how like charges repel as the ball picks up charge and is repelled from the strip. Also concepts like earthing as the ball deposits tjhat charge on the next strip
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16 June 2015 at 20:29 #12612
thanks, that’s realy useful.
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16 June 2015 at 20:31 #12613
Splendid, Dan, thanks for sharing. Now to find time to make one.
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16 June 2015 at 20:31 #12614
I think OCR at GCSE has some particle physics in it?
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16 June 2015 at 20:34 #12615
Chinese wispers in my department led my boss to believe I was using thousands of volts to accelerate steel ball bearings at incredible velocities around the lab. He was very happy when he saw what it was and also like that fact that it was a particle accelerator
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16 June 2015 at 20:36 #12616
An older GCSE question was based on Franklins bells
This is great for the discharhing charging idea (This was an old AQA question)
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16 June 2015 at 20:39 #12617
i m not sure how to find graphite 33 but i should do it in my classroom! thanks for your sharing!
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16 June 2015 at 20:40 #12618
get it from here:
- Graphite spray e.g. http://www.rapidonline.com/Design-Technology/Kontakt-Chemie-Graphit-33-S…
- its not expensive
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16 June 2015 at 20:46 #12619
As Dan says the graphite spray is easy to purchase and is less messy that the stuff I am about to describe.
You school may have a substance called aquadag on the shelf. It is a colloidal suspension of carbon used to paint things to use with the Van de Graaff amongst other things
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16 June 2015 at 20:47 #12620
It is messy compared to Dan’s spray and takes longer to dry
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16 June 2015 at 20:48 #12621
It will paint ok on polystyrene or pith balls. To get table tennis balls to work (in the picture) you need to rough them up with sand paper
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16 June 2015 at 20:49 #12622
Here is Franklins bells in action with my Wimshurst generator
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16 June 2015 at 20:58 #12623
I’ve just come back from an event called Schools Physicists of the Year at Durham University. The second year UG students have been working in groups to develop physics applications and ideas. One project was on accelerators like these. There was a very simple one for which worked well.
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16 June 2015 at 21:01 #12624
I thought I’d attached the photo but appaently not. i’ll send it to David and let hime post it!
Ruth
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16 June 2015 at 21:05 #12625
Please do Ruth
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16 June 2015 at 21:05 #12626
Please do Ruth
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16 June 2015 at 21:11 #12627
Hi Ruth thanks for sending me the file
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16 June 2015 at 21:46 #12628
They were using a VDG and had more problems with getting that to work than with the accelerator themselves.
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17 June 2015 at 08:13 #12629
I used a pencil to put graphite on a ping pong ball, less messy and equally effective.
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