Use some mathematics to work out how fast a Fidget Spinner spins. In fidgets/second.
Maths and science teachers: please do torment your students with this experiment. All they need is a Fidget Spinner and a phone; the two things they refuse to be without.
I used the SpectrumView app, but there are loads of spectrogram apps out there.
The audio the spectrogram recorded is here whynot.
This is the plot on the spectrogram screen showing the max frequency.
Thanks to Hugh Hunt for his help with this video. He showed me how to measure speed with a spectrogram.
None yet. Let me know if you spot anything!
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Music by Howard Carter
Design by Simon Wright
MATT PARKER: Stand-up Mathematician
Maths book: http://makeanddo4D.com/
Nerdy maths toys: http://mathsgear.co.uk/