John Cuthber
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Everything posted by John Cuthber
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Could A Space Shuttle Get To The Moon?
John Cuthber replied to Photon Guy's topic in Astronomy and Cosmology
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.
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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.
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Fuel consumption as an area
John Cuthber replied to Arthur Smith's topic in Brain Teasers and Puzzles
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.
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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.
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Does that actually work? Not retail in the UK.
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You can stop worrying. 2 months of dry conditions will kill most bugs- regardless of whether we are talking about bacteria viruses or what.
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It's a remarkable story. Because snow does not cause pneumonia.
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It's as if something changed in those 2500 years. Maybe this. https://en.wikipedia.org/wiki/Baconian_method
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"Antimatter falls like matter" Says clumsy scientist who dropped it.
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Does anyone else believe that? Should they?
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They certainly didn't try very hard, did they?
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I think Sensei has nailed it. You copied a puzzle, but seem to be upset that they copied the answer.
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I'm still waiting for you to explain why, if you think UPS drivers get such a great deal, you haven't joined them. Incidentally, workers demanding more money doesn't generate inflation; it reduces CEO and shareholder pay. The bit about "the price just gets passed on to the consumer" doesn't really work because , as you say, the consumer decides to buy cheaper from elsewhere. So the local company realises that, if it wants to stay in business, it's better to reduce CEO/ shareholder remuneration than to go bust. What causes inflation is printing more money or otherwise devaluing it. Strikes just redistribute the same amount of money to a different group of people. Inflation is the reduction of value of money. The value of the money depends on what I can get for it- how many square yards of lawn can I get mown for a dollar? How much bread can I buy for a pound? If you give lots of the money to people who do not actually do, or produce anything, then (on average) you get less done for your money. Huge CEO salaries are the worst cause of inflation.
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If we are being honest we are all currently agnostics
John Cuthber replied to Nevets's topic in Religion
I'm agnostic about God the same way that I'm agnostic about unicorns, hobbits and Zeus. Is that what you had in mind? It does, in fact, natter what we believe. -
Having spent 4 years complaining about the "Screaming Spires of Oxford", I wonder what Saudi Arabia has got to do with it. The faithful have alarm clocks...
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And some of the humans who post should know better than to spam us but...
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P 20 here might be a better estimate of the total. https://www.meti.go.jp/earthquake/nuclear/pdf/140424/140424_02_008.pdf It says it's about 10^16 Bq
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That's the whole "stock". If they let it out in one day it will still be less this year than the UK dumped this year. If it's over the course of a year, it's less than the UK dumped in a year. If it's over 30 years then it's 30 times less than the UK dumped per year. (Actually, it's rather less because of decay) However you slice it, it's not much stuff.
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So, Japan's one-off dumping is less of a problem than China's ongoing one. If WIKI is to be believed then "In 2021, the Japanese cabinet approved the dumping of ALPS-treated water containing 1.8 g (0.1 oz) of tritium" That's 1800mg And that's less than the sum of the two UK figures in that table. 1115 +1342
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All "uses" are beneficial from someone's point of view. The usefulness of H bomb production is a matter of opinion and probably off-topic. Tritium is a very valuable material. The problem with the waste-water from Fukushima is that it's neither dilute enough to be "harmless", not concentrated enough to be useful. China has been very hypocritical in its criticism of Japan. China "dumps" waste with higher tritium levels than Japan is proposing to. Tritium is also one of the least problematic radioisotopes simply because, like water, it rapidly runs through the body and out. The radioactive 1/2 life may be 12 years but the biological 1/2 life is only 10 days. It also has a very low decay energy. You can get higher energy electrons in a big colour TV.
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You are right; the cooking times are less, but you don't know how much less. If you only have a small flame the water will heat slowly and the (for example) pasta will spend a long time in nearly boiling water- an will start cooking. If you wait until the oven is hot or the water is boiling, you eliminate the variable "run-up" time. It's not wrong, but you might be in trouble if you cook in someone else's kitchen.