Using Lego to measure planck constant

Some physicists have presented a plan to build a Watt balance using lego to measure the planck constant. This is all done mostly to try to redefine the standard for the kilogram a bit further down the track (to avoid having a physical Kg stored away for reference) .

The overall design of the balance. image: arxiv

sourcehttp://arxiv.org/abs/1412.1699

via: technologyreview.com

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