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Acoustic stopwatch for Millikan experiment - Printable Version

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Acoustic stopwatch for Millikan experiment - solid - 01-10-2021

We are still using Millikan experiment with spontaneously charged oil drops to determine the electron charge e. This modification of the acoustic stopwatch can be useful to carry on the experiment easier and get the results immediately.


RE: Acoustic stopwatch for Millikan experiment - solid - 01-21-2021

Help!
The Millikan stopwatch works only with Android phones... What should be changed to make it working with iOS ?

When it is working it is highly appreciated by students Smile  . So some modifications can be done. For example, how to make calculations only when the time counting is finished ?

With Brest wishes
Mikhail


RE: Acoustic stopwatch for Millikan experiment - Jens Noritzsch - 01-21-2021

The .phyphox file fails on load with your representation of floating point numbers. Could you try 10^–XX rather than e–XX…


RE: Acoustic stopwatch for Millikan experiment - Jens Noritzsch - 01-21-2021

Sebastian has fixed the parser bug that caused this…


RE: Acoustic stopwatch for Millikan experiment - solid - 01-21-2021

I didn't understand how to write 2.061e-10 with 10^-10, but I have simplified equations excluding eXX. Hopefully this version will not be rejected by iOS..


RE: Acoustic stopwatch for Millikan experiment - Jens Noritzsch - 01-22-2021

I have fixed it that way:
Code:
<formula formula="sqrt(9.71*10^-12/[1])*1e6">
and
Code:
<formula formula="[3]*0.001*(1/[1]+1/[2])*sqrt(0.001/[1])/[4]/(1.6*10^-19)">
The parser errors only occurred there.

Your new experiment loads also fine now. Smile