4 ms·

I think what they mean is that matter falling into black hole emits A LOT of energy. One of less well known facts about black holes is that they are best known

I think what they mean is that matter falling into black hole emits A LOT of energy. One of less well known facts about black holes is that they are best known method to convert mass into energy. Black hole can be used to recover up to 40% of falling mass as energy. Also, technically, Hawking radiation is not the only way to get the energy out of black hole. You can extract energy from a rotating black hole. Normally, rotational energy contributes to the total mass of the black hole, but you can extract that energy, robbing black hole of some of its rotational energy and consequently, reducing its total mass. Essentially, it can be used to accelerate objects (this is called Penrose process). When two black holes collide, a portion of their mass is radiated as gravitational waves. This has been verified by LIGO showing that the resulting black hole has less mass than the sum of mass of black holes before collision. I am also pretty sure that a charged black hole could act as a fantastic battery, except there is no known mechanism that could create a significantly charged one.

westurner 3y ago
Does the OT potentially confirm models of superfluid quantum space that have Bernoulli's, low pressure and vorticity, Gross-Pitaevski,? https://news.ycombinator.com/item?id=38370118 https://news.ycombinator.com/item?id=38370118 : > > "Gravity as a fluid dynamic phenomenon in a superfluid quantum space. Fluid quantum gravity and relativity." (2017) : >> [...] Vorticity is interpreted as spin (a particle's internal motion). Due to non-zero, positive viscosity of the SQS, and to Bernoulli pressure, these vortices attract the surrounding quanta, pressure decreases and the consequent incoming flow of quanta lets arise a gravitational potential. This is called superfluid quantum gravity* Also, https://news.ycombinator.com/item?id=38009426 https://news.ycombinator.com/item?id=38009426 : > Can distorted photonic crystals help confirm or reject current theories of superfluid quantum gravity?
- westurner 3y ago
  "Closing the feedback-feeding loop of the radio galaxy 3C 84" (2023) https://www.nature.com/articles/s41550-023-02138-y https://www.nature.com/articles/s41550-023-02138-y

westurner 3y ago

Does the OT potentially confirm models of superfluid quantum space that have Bernoulli's, low pressure and vorticity, Gross-Pitaevski,? https://news.ycombinator.com/item?id=38370118 https://news.ycombinator.com/item?id=38370118 : > > "Gravity as a fluid dynamic phenomenon in a superfluid quantum space. Fluid quantum gravity and relativity." (2017) : >> [...] Vorticity is interpreted as spin (a particle's internal motion). Due to non-zero, positive viscosity of the SQS, and to Bernoulli pressure, these vortices attract the surrounding quanta, pressure decreases and the consequent incoming flow of quanta lets arise a gravitational potential. This is called superfluid quantum gravity* Also, https://news.ycombinator.com/item?id=38009426 https://news.ycombinator.com/item?id=38009426 : > Can distorted photonic crystals help confirm or reject current theories of superfluid quantum gravity?

westurner 3y ago
"Closing the feedback-feeding loop of the radio galaxy 3C 84" (2023) https://www.nature.com/articles/s41550-023-02138-y https://www.nature.com/articles/s41550-023-02138-y