John Cuthber

"Do we really need complex numbers?" It depends on whether or not you want to be able to solve quadratics. If you want solutions, then you have to put up with complex numbers.

Am I the only one who regrets the passing of metal biscuit tins and their replacement by plastic ones?

Ever heard of photosynthesis?

Estimates vary but the current approval rating of the government is about 20%. The government is opposing a general election on the basis that the population would kick them out. That's not democratic. There's also the underlying problem; the current government was elected even though most voters preferred a different party. We need a new electoral system to replace "first past the post".

The wash cycle will have done a pretty good job of removing bacteria and mould spores. So, even if the pillow was just sitting in the drier, there won't have been much microbiology happening.

People would pay me not to play. It's interesting. I recognise the desire to teach kids the value of work. But, if you pay them to do chores, you undermine the idea that they should do them simply because they need to be done.

That's still magic, not medicine.

That's a matter of definition. https://en.wikipedia.org/wiki/Nickel_allergy#Epidemiology

A vacuum is a much better insulator.

Yes

I'm not saying it's a good idea but... If you use solar power to drive the cooler then the heat (including the waste heat from the electrics etc) is exactly the same as if the sunlight just warmed up thee ground. The conservation of energy leads to the question "how could it be different?". I realise the temperature of lakes will go up more or less in line with global warming. But is there any reason to believe that the lakes are particularly susceptible? Why focus on cooling lakes rather than, for example, cooling fields?

Unfortunately, I can't see that being cost effective. There's no reason to assume that lakes are much warmer than they were before mankind got involved.

Freeze it until it's not "rubbery" then machine it quickly.

What on earth did you study?

If you are seeking to mix gases, I have good news for you; the laws of thermodynamics are on your side. If you arrange the gas feeds to the tube to be fast and tangential so that they "swirl" down the pipe, they will mix very rapidly.

Where does one get the BaFeO5 from? It's hard enough to get https://en.wikipedia.org/wiki/Barium_ferrate And someone is suggesting taking another couple of electrons of the iron. I don't doubt the existence of Fe 8+ ions in the sun, but I don't imagine they have any chemistry. Much as I like reading old textbooks, I don't always accept their claims at face value. The difficulty with doing analysis to determine the oxidation state of the iron would be great today and I simply don't think they would have been able to guarantee accuracy back then. (This might be one of the examples of Mossbauer spectroscopy actually being useful.) Certainly the WIKI page doesn't say anything about Fe(VIII) https://en.wikipedia.org/wiki/High-valent_iron They were. I have a copy from 1962. It mentions the carbonyl complexes as examples.

It's not an either/ or thing.

Have you seen this?

I wouldn't say you were a nobody...

No. The shareholders own them. And the rest of your post isn't much better.

It's late on a Friday... Reevaluate Gin Mix.

The plan is to give vast sums of money to an industry that is already making a huge profit from the turmoil of war. Then to get the taxpayers to pay for that handout. The rationale behind this is that the government is paid by the energy companies.

https://xkcd.com/675/

Does that mean it's a video on polyester on polyester?

Most natural fibres, derived from plants, are essentially made of cellulose https://en.wikipedia.org/wiki/Cellulose Silk is largely a protein called fibroin https://en.wikipedia.org/wiki/Fibroin And wool is mainly keratin. https://en.wikipedia.org/wiki/Keratin Some artificial fibres are made from reconstituted cellulose. Nylon could be any of a number of polyamides https://en.wikipedia.org/wiki/Polyamide And polyester is an ester of ethylene glycol with terephthalic acid. https://en.wikipedia.org/wiki/Polyethylene_terephthalate There are some others. All of those materials are intrinsically white. The colours are due to dyes mixed into the fibres or added onto the surfaces. For example, for cotton, those two or three processes are Harvesting ginning carding spinning mercerising dyeing weaving, cutting sewing. I may have missed two or three.