exchemist

This sounds very doubtful. "If the incident has occurred, the global silence is perplexing. A nuclear submarine sinking should lead to global attention because a nuclear reactor leak due to damage can have serious consequences, including water contamination," a submarine expert told the EurAsian Times." This report was on 4th October. There has been nothing since. If it were true, surely all manner of organisations would be up in arms about contamination risk etc. Failure of the oxygen system after a mere 6hrs seems most improbable. Nukes are designed to complete entire tours, lasting weeks, without the need to surface.

But why would a nuke have banks of lead acid batteries? Surely that would be in diesel electric subs. If it had been one of those, it would be discharging the batteries while submerged. To grossly overcharge them enough to generate H2S it would need to be on the surface with the engine running. So I’m a bit suspicious of this story. Especially since it seems to come from YouTube. Is there any corroboration from a reliable source?

You don’t struggle to breathe, though. The breathing reflex is governed by the dissolved CO2 in the blood rather than the oxygen concentration. Altitude sickness consists of other symptoms, headache, nausea, dizziness etc. ….and difficulty sleeping.

Where is iron smelting on this chart?

You are still confusing force with expenditure of energy. A rock on the ground exerts a force on it but no energy is expended. Think about that. To do work, i.e. to expend energy, there has to be motion in the direction of an applied force. A weight falling through a distance can do work. But a stationary weight does not do any work.

I don't understand this.

Then what you are talking about is not a drift but just thermal motion, surely?

Don't you need an electric field to produce a drift current?

It’s normal and most vitamin supplements are a waste of money. However vitamin D in winter, if you live in cloudy northern latitudes, may help the immune system, as you may not get enough sunlight to synthesise enough on your own.

Confess I don’t follow this. Why would any current flow in the wire?

No.

Sure, a lot depends on how many people have been fed and how much dirty crockery and pans have been created. Like you, I let things drain and dry on the rack, when there are only one or two of us. If it’s a big group that may not be feasible, esp. if there are glasses as well - they really do need drying or they get streaks. But the tea towels or dishcloths also get used for other purposes in my kitchen, e.g for wiping damp hands while cooking.

OK fair enough I wrote that badly. The changing and washing I intended to refer to dishcloths, not to the utensils used to wash the dishes in the sink. If those utensils are absorbent they need to be allowed to dry, or they will grow bugs and stink.

Agree with @Sensei. In fact I have read that wood in particular is a curiosity. Studies have apparently been done comparing synthetic and wooden chopping boards and worktops which show, counterintuitively, that wood, irregular, absorbent and grainy thought it is, retains fewer bacteria and fungi on the surface than synthetic surfaces. This is attributed to natural antiseptic properties of the material. The takeaway from the article I read was that rather than worrying too much about worktops and boards, which you can just wipe down each day, the places to watch in your kitchen for pathogens are the dishcloths and the sponges and cloths used for washing the dishes. Change and wash those very regularly.

This looks wrong to me. It would be true only if, when you grilled marinated meat, you were unable to achieve the browning/blackening of the surface - which is the whole point of grilling as that is where the special taste of grilled meat comes from.

Good to see you here. I wonder if we will get any more refugees.

You can perhaps take the Spinoza/Einstein view that the laws of nature - or more properly perhaps the order in nature, since "laws" are usually man-made attempts to codify aspects of that order - ARE in effect the designer. But yeah you can't get any further back. An 8yr old child is capable of asking "why" questions to every explanation, until you inevitably get to the point at which you have to say "I don't know why".

Salt, and often pepper, are generally added before. However there are exceptions, e.g. some dried pulses such as lentils are said to become tough if cooked in salted water. So you will find dhal recipes call for cooking them in plain water first and then seasoning later when the spices are added. But if you talk about spices in general, that depends on the spice and the recipe. Do you have something more specific in mind?

Engine block. Cars run happily in winter on normal choke settings, once they have warmed up,

Nobody has proved the story was made up. It is simply that your original assertion about it was wrong and ridiculous.

As far as I know there are 3 omega3 fatty acids, ALA, EPA and DHA. The latter 2 are found in oily fish. (ALA is only found in plant products such as nuts.) I suppose it is possible the ratio of EPA to DHA may differ in different supplements. But the evidence these supplements help seems a bit weak. What does work is eating oily fish. Why there might be a difference in efficacy I don’t know. Possibly to do with the uptake process during digestion - but I’m speculating.

We also find trees attractive, though we are not attracted to them physically, in the way bees and butterflies are to flowers, as they are not a food source for us. Probably it is to do with being apes. We find trees restful, as they are historically our natural environment. I would guess fruit was an important food source to both apes and early man, so perception of their colours would have been important and we would have found them attractive. Perhaps with flowers it is part of the same response, arising from the colours, or just that flowers indicate a botanically rich environment, with the promise of fruit to come.

Still? The examples I gave were from some months ago.

OK I see Project Green Challenge is a real thing for schools and colleges, so I won't accuse you of spamming the forum. A couple of comments: - You need to get rid of the greengrocer's apostrophe in the first line, as it makes the ad look like the work of crank. "Its" does not have an apostrophe. ("It's" is short for "it is".) - The suggestion that glyphosate is a danger to human health is questionable at best. See this assessment by the European Food Safety Authority (EFSA) in July of this year: https://www.efsa.europa.eu/en/news/glyphosate-no-critical-areas-concern-data-gaps-identified. Furthermore the WHO clarified its 2015 assessment a year later, here: https://www.chemistryworld.com/news/who-clarifies-glyphosate-risks/1010208.article. So your poster, at least as currently written, looks to me like unjustified scare-mongering. This is important, as overblown claims by environmental activists will eventually damage their credibility. If you want to be listened to, you need to do your research and not exaggerate wildly. - You could perhaps consider a poster with a more positive message, stressing the benefits and ease of use of the natural options you mention. I think everyone understands that the less we spray artificial substances around the better, so domestic gardeners will be receptive to a message along those lines. But farmers can't mulch their way out of weed infestations, nor can they pull weeds out by hand.