John Cuthber

I do, and it's not just me. https://www.keele.ac.uk/sustainable-futures/ourchallengethemes/providingcleanenergyreducingcarbonemissions/hydeploy/ We use billions of tons of natural gas each year. Mining "between 6 million and 250 million metric tons of hydrogen" isn't much use.

We use something of the order of billions of tons of natural gas each year. Taking the geometric mean of their estimates means that known hydrogen reserves would run out sometime between Xmas and Easter if we used them at the same rate.

I wonder if people engaged in this know what the death tolls on each side look like. This may clarify it (It obviously only includes civilians) https://countingthekids.org/?fbclid=IwAR0rsRw5R5C0yBNhvKy7_eHdasFiJpkJ0J1L85h8BIKvkKgHyhzLgI2py-4

Is there any evidence of that?

That's what the Tories did. They transferred planning responsibility to a cheat. https://www.insidehousing.co.uk/news/news/jenrick-steps-up-threat-to-council-with-ultimatum-over-local-plan---64679 Their man is "Going to build 5 new towns in the next couple of years to solve the housing crisis". How ? Probably better than the last guy built 40 hospitals https://www.theguardian.com/society/2023/jul/17/government-on-track-to-break-boris-johnsons-40-new-hospitals-promise

Derris is not DDT. https://en.wikipedia.org/wiki/Derris It contains https://en.wikipedia.org/wiki/Rotenone Which is often up forward by environmentalists as "good". "Soil Association standards allow organic farmers restricted use of seven nonsynthetic pesticides that have been approved on the basis of their origin, environmental impact and potential to persist as residues. They are copper ammonium carbonate; copper sulphate; copper oxychloride; sulphur; pyrethrum; soft soap and derris (rotenone)." From https://www.soilassociation.org/media/4920/policy_report_2001_organic_farming_food_quality_human_health.pdf It's associated with parkinsonism. https://en.wikipedia.org/wiki/Rotenone#Parkinson's_disease

We used to rely on mulching, hand weeding and "bio controls"- whatever they may be. They weren't good enough. That's why we started using weedkillers. Glyphosate may be carcinogenic, but so is alcohol and that doesn't stop people using it. It's a risk/ benefit question. Only presenting the risks is dishonest.

It's a commonplace observation that "if you drop a knife, you should let the floor catch it". If that's an option, it can't be a reflex- they are fast but unsophisticated.

Here's what you said, and what you said it in response to. You asked what does it have to do with escape velocity and I explained why part of it has something to do with escape velocity. I said "The escape velocity isn't strictly relevant, but it's a proxy for gravitational energy." And you ignored that and focussed on this bit. "If you don't fire retro rockets to slow it down, it hits the sun." Repeating your unproven assertion that you can't put something in orbit near the sun- well, in reality it depends in how near you get- but that's beside the point. But the answer to "so what?" is still that escape velocity- or gravitational potential energy- is important to the idea of putting something in orbit round the sun (As Halc said)- even if the thing melts. You brazenly ignored part of what Halc said and bolded part of it, didn't you?

Tell the site software. You did, in fact, say it. You were quoting Halc.

Yes

And so it won't end up in orbit round the sun. Had you forgotten what you were replying to? That's a convenient way to carry oxygen; but not a lightweight option. Why wait for an emergency? One of these will scrub out the CO2. https://en.wikipedia.org/wiki/Rebreather_diving But they aren't easy to work with. These are even more scary. https://en.wikipedia.org/wiki/Potassium_superoxide#Applications And we know what happens if you mess up an oxygen generator of that sort in water. "Analysts concluded that 23 sailors took refuge in the small ninth compartment and survived for more than six hours. When oxygen ran low, they attempted to replace a potassium superoxide chemical oxygen cartridge, but it fell into the oily sea water and exploded on contact. The resulting fire killed several crew members and triggered a flash fire that consumed the remaining oxygen, suffocating the remaining survivors." from https://en.wikipedia.org/wiki/Kursk_submarine_disaster

The escape velocity isn't strictly relevant, but it's a proxy for gravitational energy. Essentially you "drop" your spacecraft towards the sun and it accelerates as it goes. If you don't fire retro rockets to slow it down, it hits the sun. It takes pretty much as much fuel to get something "down" as it does "up". What's the temperature at midnight? If you make sure your satellite rotates fairly fast you need to look at the average temperature, not the peak. There's a difference between "flying to Moon" and "flying to the moon". But... https://www.tripadvisor.co.uk/Hotel_Review-g5113909-d5113592-Reviews-The_Moon_Inn-Stoney_Middleton_Hope_Valley_Peak_District_National_Park_England.html

You don't need to reach earth's escape velocity to get to the moon. The moon is in orbit, clearly well under the influence of Earth's gravity. You can't get to the moon with A space shuttle but... I'm sure there's an XKCD cartoon with a small flattish hill made of fireworks. How many shuttles would it take to launch a fully fueled shuttle into space?

That ship doesn't travel as far as some.

In addition to being a stupid attempt to defend your own bad practice; that's wrong. The lawyers in Liebeck v. McDonald's Restaurants and the like had never flown to the moon.

Which sort of molecule?

It's a video of the reaction not happening. There's no precipitate. And there's no reason to suppose that sulphuric acid is produced.

If you knew the exact time and date of the picture, and where it was taken. And you also had a second similar picture from elsewhere, and knew the time date etc for that one, I think you could triangulate the position of the moon by assuming the sun is "very far away". But I think that's doing it the hard way.

Does that actually work? Not retail in the UK.

You can stop worrying. 2 months of dry conditions will kill most bugs- regardless of whether we are talking about bacteria viruses or what.

It's a remarkable story. Because snow does not cause pneumonia.

It's as if something changed in those 2500 years. Maybe this. https://en.wikipedia.org/wiki/Baconian_method

"Antimatter falls like matter" Says clumsy scientist who dropped it.

" aren't 'the 5 senses' to do with the interaction between us and the rest of the universe ?" The idea that there's only 5 is one of Aristotle's mistakes. "And aren't bathroom visits due to internal proceses ?" So? We have more than 5 senses.