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Showing content with the highest reputation on 08/30/23 in all areas

  1. I would be looking for something that would allow me to plug in a USB cable and be able to record image..
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  2. The UK has now recognized Taiwan as an independent country.
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  3. Can you make precise what exactly you mean by “volume” here? Is it a 3-volume of space, as in a geodesic ball for example? Or a 4-volume of spacetime? Both of these depend on the metric, as do all measurements of lengths, angles, areas, and n-volumes in general on a differentiable manifold. For 3-volumes this is immediately obvious without any further ado, since FLRW spacetime is not a vacuum solution, and thus the Ricci tensor does not vanish. Therefore 3-volumes are not, in general, conserved as they age into the future, irrespective of your choice of coordinates. The only way to get them to be remain constant would be to choose a cosmological constant of just the right value so that you end up with a constant scale factor. But that is not compatible with observations. For 4-volumes of spacetimes, the determinant of the metric enters as part of the volume element, so when you perform the integration to find the total volume of a given spacetime region, the result will explicitly depend on the times you use as integration limits, since the scale factor will be in there. So again, expansion has an effect here. All of these are general mathematical results in differential geometry, and not specific to just GR as a theory. I’m happy to show you the mathematical expressions if you need to see them (but I’m sure you’ve seen enough of me around here to know that I’m not just making this up). Otherwise Misner/Thorne/Wheeler has a good overview on how to construct general volumes on differentiable manifolds, or you can take a quick look on Wiki as well.
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  4. Holy feck, did you just troll me? Dude, no one who advocates a set population for the planet is advocating people dying. This is about family planning and a demographic shift to smaller families being a viable choice and one that is rewarded. i.e. fewer new people being born. I'll thank you also to skip the forced sterilization strawman, too.
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  5. I don't think anyone needs to be sterilized. Many countries have already shown that simply by being prosperous (and the things that go along with that) is often enough to lead to population decline. Stopping lives from beginning can be achieved through global development. Not many people are opposed to their lives getting better.
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  6. The thing is, companies are there to make money. Pharma is there to make money from Pharmaceuticals. For all commerce, their first responsibility is to the shareholders or owners. There's nothing wrong with that, it works. Improving the world is the job of voters. The politicians will only do what gets them votes, in general. Or what they calculate will win votes. It's up to the public to shape the world, by using the media, and influencing the politicians. The shape of the world is the work of the man in the street, at the end of the day. Both through what they do, and what they don't do.
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  7. They released his fingerprints
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