exchemist

Oh I see what you mean. The gravity actually at the surface will have lateral components, due to the fact the mass is not all lined up beneath one's feet, whereas as one climbs higher above the surface the force increasingly becomes all orientated downwards. So yes, I can now see that a more diffuse mass will have weaker surface gravity than a more concentrated body of the same mass. So, given that, at a large distance above the surface the gravity from both would tend toward the same value, that would imply the gravity falls off more slowly with the diffuse body than the more compact one.

Sure. But then that's just the way of the world generally: success has many fathers, but failure is an orphan. The important thing is to have a system that is effective. In my opinion, one of the most dangerous trends in modern politics is the belittling of expertise. "We've had enough of experts" is the road to ruin - as we can see around us.

This is the argument for offloading this sort of highly technical supervision to an independent regulator, whose office is composed of long term professionals and who can come to the legislators from time to time with requests for legislation to help enforcement as required. The problem then is the "small government" politicians will moan about "unelected bureaucrats" , when the whole point is to get people who are NOT elected to do the job, so that some degree of professional expertise can be brought to bear.

Does it? Surely it depends only on the the planet’s mass, per Newton’s law?

So, then, is the thread topic just that politicians have to deal with all the real issues? If so, I'm not sure that's true. "To govern is to choose", after all. They can't do everything all at once and they can't be everything to everyone.

So, nothing better than YouTube videos, eh? Wake me up when you have something worth discussing.

This seems on the face of it a very odd claim. Can you give some context or, best of all, refer us to a source or an internet link, in case that helps understand what is meant?

With all due respect that is a quite different issue from the one described in the BBC article that you linked in the OP. That BBC article is about people's addresses being falsely used as the legal registered company address, by scam companies. What you are now talking about is just one of the numerous internet scams, involving impersonation of a service provider in order to scam people. The scale of these scams is indeed shocking and well worthy of attracting far more vigorous action by law enforcement than it has received up to now. But it has nothing to do with Company registration or the operation of Companies House.

I read this. But what I can't see, from the report, is why it matters very much. OK so these people get some mail they have to return to sender. But that's about it, isn't it? They are not held liable for anything, just because their address has been used. There's nothing here to suggest they have suffered any loss as a result.

They are, but they also have an amine group.

No. A white surface reflects more incident radiation, but once the radiation has been absorbed by the black surface it is not transmitted through the material by radiation any more, but by intermolecular collisions, so colour is no longer relevant.

This looks like homework. What do you think happens, and why?

It just means that intellectual disciplines are a bit more complicated to master than sport, doesn't it? Why would everything be the same, just because some klutz pulls a "rule" out of his arse?

It seems there have been studies on this: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4881732/ Fumes from hot oil are not combustion products, but they do contain a lot of species chemically altered by heat -by thermal cracking, in effect. There are some details in the link, though that study was mainly concerned with the epidemiology of lung cancers.

I seriously doubt that determining volume by water displacement can be anything like accurate enough, unless the object is huge. You would be talking μl. From what I have read, a more realistic way would be by difference: getting a sample of known gold of the same weight, putting the two either side of a balance and then submerging both in water, to see whether the scale tips or not, as any difference in volume will create a difference in buoyancy.

I believe my son intends to buy me this T-shirt for my birthday:

I think the troll has now been banned, but the mods haven't yet dreamt up a suitably humorous post to record it for posterity. But what a twat, eh?

If such allergies affected a significant proportion of the population and involves enough of the foodstuffs consumed then it would generate evolutionary pressure, I'm sure. But as it affects only a small fringe of people, I suppose it's possible that the rate at which allergies arise is in balance with the rate of extinction of them. There are examples of food intolerance modifying a population, for instance the ability of adult N Europeans to consume animal milk without trouble, whereas lactose intolerance in adults is the default in many populations originating outside N Europe.

Yes of course they do - though people argue about how to interpret QM. By the way, "common sense" is a lousy guide to either QM or GR. Both were developed by rigorously following the observations, without preconceptions.

Yes, yes, but we're all waiting for you to start spamming. Then we'll ban you. 😆

Mechanical energy can be converted into non-mechanical forms of energy, e.g. chemical or electrical energy. So it is obvious that mechanical energy is not conserved.

Yes, it's curious. It rather looks to me as if he wants to get banned, perhaps (I speculate) in order to reinforce a worldview of victimisation by woke atheists, or some such Trumpy paranoia. At least, that's what comes across. Either that or he's just a random loony with "issues". Anyway, I expect he'll get his wish eventually.

Yes exactly. The spectrum of any element or compound is usually a series of lines (atoms) or bands (molecules) of absorption or emission at characteristic wavelengths, corresponding to the various natural excitations that are possible in the species in question. With a complex mixture it can be quite tricky disentangling them and assigning them to whatever is responsible. One generally looks first for certain strong lines or bands that are not often overlain by something else, or in the case of water certain features like the broad blob of absorption it gives in the IR. Once you know it is there, you can allow for what it may be doing elsewhere, to obscure other things that may also be present, hidden behind it.

I think you've nailed it. I did not know there was such a thing, but here is one commercial range of them: https://www.olympus-ims.com/en/xrf-xrd/xrf-handheld/

Well, what can one say but "Oh Christ!"😁