studiot

I don't worry. I just happen to know that the UK regs offer substantial advice on just the subject you are asking about. I would have to dig out the detail, but I would expect for commercial reasons any company to do the due diligence themselves.

I see you are still interested in this subject. I don't know where you are in the world, but the UK wiring regulations has a section on such direct water heaters. They are used in large scale heaters. I would advise any company manufacturing these to read the appropriate section.

Mathematics is not only about numbers and counting and fraction of maths taken up with this is diminishing. You do not need set theory or to be able to count to define numbers, though both are useful in keeping things tidy Number theory itself extends more widely than the counting numbers. Edit : I now see that you are reintroducing your very recent, more jumbled, topic placed in the trash can by the moderators. Hopefully you have cleared this simpler version with them?

It's not stupidity if you don't know something but if you ask that's wisdom. +1 The more you put in the more you will get out. Or The better you frame your question the better the answer you will receive.

We are agreed now ? +1

Sounds more like H P Lovecraft or Algernon Blackwood to me than a scientific presentation. You should look to more respected sources for example this one Ernest Balwin The Nature of Biochemistry 1967 Cambridge university Press The figures he presents speak for themselves. Interestingly the % of gases in the blood is nothing like the % of gases in the atmousphere.

No I don't think our terminology is different but my point was that 'equivalence' hides more levels of meaning. Consider the set of positive integers, n. This may be partitioned into two subsets, which form equivalence classes. n is odd n is even No two members of either subset are numerically equal. No two members of either subset are identical. Yet any even (or odd) number is equivalent to any other even or odd number. You can also demonstrate this with functions and mappings if you please. So in that case there are three levels of meaning to the word "equivalence" And before I was only describing two.

I think you didn't pick up the connotations. Black is the European colour of mourning White is the Chinese colour of mourning.

Mass density ? What theory would that be? The average density of Earth is about four times as great as that of Jupiter, yet the gravity of Jupiter is nearly three times as great as that of Earth.

No I think you guys got it alright. But instead of a chinaman v a european eating a banana how about the thought (equallly simple) Wearing black or Wearing White ?

Thank you ydoaPs But we should be careful using the word 'equivalence' as it does not mean 'equal', and of course certainly not identity. Mathematical Equivalence is a very specialised way of using partitions of sets, as I'm sure you know.

Not quite sure where to put this but will start here. Headline Machine translates brainwaves into English. https://www.bbc.co.uk/news/science-environment-52094111 With 3% inaccuracy So do we think the same in all languages?

I hope you gathered from the discussion that 'hydrogen' doesn't do this. I also hoped you would gather the need for greater specivity in Science and scientific discussion. (Your latest thread suggests otherwise as responders are struggling because you haven't defined your terms tightly enough.)

First and foremost, you are answering the wrong question. The proposal in this thread was not to about flood alleviation per se, but transporting some of the (flood) water from areas where there is excess to areas where there is deficit. There is no requirement for total flood alleviation. Having said that, the two can be linked or combined. Yes there have been proposals, some of which were implemented for extended perdiods of time even several thousand (up to 5,000) years ago. The Harappan ciivilisation was a good example which controlled the waters of one of the great rivers of the world on its flood plain. More recently, the Romans are famous for their aqueducts, some of which are still in use. As I said, there is another point of view and dams are not the only engineering solution (although the Nile flooding has been reduced by such dams in additions to the extension of irrigable land). More recently the Chinese are working on projects to control the waters of another great river. Do you therefore think the Dutch should all move to another country ?

Yes indeed, but there is another viewpoint about this, other than defeatism.

+1 But just think of the business opportunity. Someone is offering to buy your half of the great lakes for more than you value them as.

We normally do this the other way round. It is called expansion of determinants. There are plenty of explanations to be had on google eg https://people.richland.edu/james/lecture/m116/matrices/determinant.html

So would I.

Rest assured that thread is now in the right place.

A very good point that also applies to other nations right across the globe. I wish others would think like you. My view is there is a lack of politcal will / organisation not a lack of physical resources to achieve this. If you were dying of thirst in the desert which would you value more A pint of water or a ton of gold?

I see this thread was started in 2005. I hope that anyone using a mouse from that time has cleaned the bottom many times in the intervening years. Not doing this interferes with smooth operation. This is because the sliders pads pick up small amouts of material, which cause the mouse to stick very slightly when moved and also ride above the correct level from the surface.

In the meantime some good news, especially for the OP. Free Fish and Chips for all. https://www.bbc.co.uk/news/uk-england-oxfordshire-52047985

Great golly gosh, what on Earth do you say to a man who writes this Immediately followed by this *************************???????????????????????????????????????????????????*****************************!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Pull the other one, it's got bells on. The following statement is an incorrect attempt at mathematics. Only certain values can represent the locus of a moving particle. Put as you have done it represents a complete 4D manifold, as you correctly stated earlier. It cannot represent both the frame and the locus.

I really don't see how you can base your claim on what we now call Faraday's Law. Faraday was the archetypal example of the expermental scientific method in action but he was not a mathematician and he knew nothing of derivatives , ordinary or partial. He was instructed by the Royal Society in 1821 to investigate the results published by Oersted and from then until about 1860 he did this and more in spades. He was the first to show that one could generate electricity from magnetism and developed a field theory not dissimilar from the modern quantum one. So have you read what he actually wrote in his excellent reports about induction? Hint he was prompted by a comment from a gentleman called Moll to realise that the rate of change was important, and promply devised experiments to explore this.

I was not thinking about patient treatment, either giving them sunburn or cooking them. I was really thinking about decontamination, for instance whether to turn the washing machine temperature up or expose stuff to the strong sunlight we have at the moment. And I was tryi g to fit into Hypervalent Iodine's one of three threads as requested.