481 karma · joined June 5, 2016
The policy update seems to be global: https://www.facebook.com/privacy/policy
There is videos on YouTube of it with 2TB of flash.
First it shows a temperature graph vs moment, as they heat it it loses the diamagnetism around the temperature LK99 is said to be superconducting.
Second only a superconductor will have net-zero field, which means "stable" levitation. In the video they approach the sample with the magnet and flip it while the piece is mostly "in place". A regular diamagnet generates a external field that "follows" the field applied so it would likely move sideways, that is why to "levitate in place" a diamagnet people normally use a Halbach array.
EDIT: A Halback array is made alternating the poles N-S of the magnet, so that forces of repulsion created by the diamagnet cancel. This is why you will see people using multiple magnets when levitating pyrolytic graphite.
There are several reasons why China/Japan/Korea had very little regard for international IP on its high growth years - Brazil should do the same. Being per capita poor means that majority cannot consume imported goods, sometimes those are important for further development like machines, methods and tools - for small and even medium size entrepreneurs.
Cryptocurrencies actually bring several benefits and better solutions for the problem of trust in a store-of-value or exchange contract. The world needs Bitcoin now more than ever, we are already living in a multilateral world where US and China exert pressure to force international contracts to be denominated in USD abs RMB.
That is an awful deal when both countries can print unlimited amounts and distribute to their preferences like happened during this pandemic, specially in the US.