Do you know what are these physics-I-lab devices?

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The discussion revolves around identifying the applications of various lab devices. The first device appears to function as a low-cost centrifuge, utilizing high-speed spinning to separate components. The second device is speculated to apply strong forces or measure height, though its exact purpose remains unclear. The third device raises questions about its unusual metallic strip design, with some suggesting it might be an electrical device intended to produce a current in conjunction with other components. Overall, there is a mix of humor and curiosity regarding the devices' functionalities, with a focus on their potential uses in a laboratory setting.
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I think they were developed to torture grad students who didn't improve their grades enough.
 
1.: You can spin the top quite fast. If the attached metallic things can rotate as the comparison between the two images suggests, it could be used as cheap centrifuge.
2. Something to apply a strong force? A height measuring device?
3. Does the metallic strip look to be so weird on purpose?
 
mfb said:
1.: You can spin the top quite fast. If the attached metallic things can rotate as the comparison between the two images suggests, it could be used as cheap centrifuge.
Isn't it an electrical device in order to produce a current in combination with something else?!
 
I don't see how you would use together with electricity.
 

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