swansont

No. I expect that will change in the future.

Then this philosophy already must exist, since science exists.

You appear to be mixing science and philosophy.

Newtonian gravity depends on mass and distance. You could express the mass in terms of a density, but it would also then depend on the size.

California borders an ocean. What is the cost of desalination? Transporting water isn't going to stop flooding. ___ California was mentioned, and their problems are partly their own doing. Agriculture requiring lots of water (e.g. almonds) in an arid region, and huge populations in the cities. Maybe it is political will that's lacking. But from where would California get its water piped in? The thing about dams is they're on rivers, which comprise the existing water transport system that we have. The problem is that anyone near the river tends to take water from it (and that gives rise to some long-standing water rights issues)

The graph here shows that the US residential cost of water is around 70 cents a gallon in major cities. Less than $40 a barrel. https://www.circleofblue.org/waterpricing/?gclid=EAIaIQobChMIoYvu0L-96AIVCoTICh1aJAOzEAAYASAAEgIWgfD_BwE What's the profit margin on that? How much would a pipeline cost to run and maintain?

That makes sense to me, because if you're going to do a bio experiment you need to be absolutely sure that you have no contamination, or else your experiment is going to fail. What would be useful for studiot's question (and I am also curious) would be a study for shorter exposures, or to answer the question similar to the study about the various surfaces — how does the population vary over time, so people would know if e.g. a 5-minute exposure would be useful for sanitizing surfaces.

It's a different strain, but I found a study https://www.ncbi.nlm.nih.gov/pubmed/14631830 "Viruses stayed stable at 4 degrees C, at room temperature (20 degrees C) and at 37 degrees C for at least 2 h without remarkable change in the infectious ability in cells, but were converted to be non-infectious after 90-, 60- and 30-min exposure at 56 degrees C, at 67 degrees C and at 75 degrees C, respectively. Irradiation of UV for 60 min on the virus in culture medium resulted in the destruction of viral infectivity at an undetectable level." I don't know how to read that last sentence — the destruction was undetectable, or the infectivity was undetectable? Also, 60 min seems like a long time in terms of using UV to sanitize surfaces. (For anybody thinking that warm weather will help, 56 degrees is quite toasty.)

Absorption would make sense. Adsorption is a surface effect.

"up to 4 hours on copper, up to 24 hours on cardboard" A factor of 6 is significant, wouldn't you say? Brass is already a standard material for doorknobs and push plates. Unfortunately, so are plastic and stainless steel, which are often chosen for aesthetic reasons (they don't tend to tarnish)

djkfslgdljfghdjkfg has been banned as a sockpuppet of Hshshdndjjshs

Brass contains copper, so that part is sort of expected. Similar effect for bronze https://en.wikipedia.org/wiki/Antimicrobial_copper-alloy_touch_surfaces

tmx3 has been banned at their request (technically the request was account deletion, but we don’t delete accounts. This is the closest we come) Foul language and abuse would have led to this result anyway

But you haven’t actually done that. If you have a false negative, and the ones with the virus who have mistakenly been cleared will be able to more easily pass the virus along. OK, I was taking “a set of 7 samples” to mean you test 7 people. Still, the false negatives will be amplified, and testing needs to be more sensitive to come up positive since they’re diluted, as J. C. has pointed out.

How does a 1% probability apply? Is that based on anything valid? How have you eliminated anyone you haven’t tested?

Peter Dow has been suspended for soapboxing (basically treating the site as if it were his blog) and ignoring rule 2.7 — posting to advertise personal sites

The flu can be worse, but not for all strains, and we develop vaccines for the strains expected to be problematic each year. Less is known about the coronavirus, and we don't (yet) have a vaccine for COVID-19.

It’s lit from inside the cabin.

It may wobble less, but it wobbles. The direction of the north pole (rotational axis) is not fixed. https://en.wikipedia.org/wiki/Polar_motion

Schmelzer has been suspended for hijacking/spamming his pet theory all over the forums

Yes, although they will behave differently. The wavelength of a particle is h/p

Yes. If by "trap" you mean in an optical cavity — put the radiation in a cavity so you have a standing wave, it just sits there, but you can't localize where the photon would be. That's true for anything with a wave nature.

Right. It's in a region, but you don't have a specific location, just limits on where it might be found.

The momentum-position version of the HUP tells you that the particle has no definite location.

There are quantum systems behave like that, so we study it. Such as diatomic molecules. The analysis tells us about their energy states, and that informs us on e.g. how photons might interact with them. We study behavior we can measure of a system in a potential well. Position is not an eigenstate. Energy is. (Do you understand what I mean by eigenstate?)