Yup, really dangerous they are, I saw it on the telly:
443 posts • joined 7 Sep 2010
I've a recollection that we (the UK) had very good drafting lawyers and they wrote the bit about having to be full members to be able to access the full benefits, which the UK was very insistent on. Perhaps we should knock some points off for not considering that in the future we would take ourselves out of full membership and lose the full benefits. But on the other hand we should definitely award points for the fact that there was no way round that rule because we had written it so well!
Not sure about Nitrogen Oxides - you get those from internal combustion e.g. jet engines, petrol/diesel engines because the nitrogen is in there with the fuel and oxygen (and compressed, hot, etc.). Whilst the rocket exhaust is obviously hot, I think the only possibility for nitrogen oxides would just be from the surface of the exhaust reacting with the external atmosphere at normal(ish) pressure. At this point I need to confess to having no idea what difference that makes...
I used to work for a submarine cable manufacturer and, yes, there was a lot of gold plating (for corrosion resistance). Also, there were no connectors - everything had to be soldered or otherwise physically bonded. Soldering to gold plated pins is a lovely experience - even I could get the textbook solder fillet shape!
in principle, possibly. I think it is one of those "surface area that presents for air resistance vs. mass" things. But when in orbit there is the variable density with height issue too. So I think everything can get very non-linear so not much change in distance from the earth can lead to radically different lifetimes. Furthermore, if it was an explosion (residual fuel? pressure tank?) then some bits might be moved into orbits that will decay quicker and other lumps the opposite.
But the perigee at least seems fairly low (422 km) and the ISS orbit (~350 km) requires periodic boosts due to atmospheric drag so, notwithstanding the non-linearity at least it seems the pieces are in the ballpark range to get some drag every orbit...
After a (probably ill-informed) conversation about the dangerous wildlife of Australia I once made a throw-away remark along the lines of "well, at least the plants seem OK". But a little voice in my head said (probably in an Australian accent) "you sure about that mate?". So I checked.
"stinging hairs which cover the whole plant and deliver a potent neurotoxin when touched"
"extremely painful stinging sensation that could last from several hours to 1–2 days"
" 'For two or three days the pain was almost unbearable; I couldn’t work or sleep, then it was pretty bad pain for another fortnight or so. The stinging persisted for two years' "
"Dendrocnide stings have been known to kill dogs and horses that have brushed against them"
There was a more recent (but failed) attempt with a solar particle capture satellite that was supposed to parachute the samples back: https://en.wikipedia.org/wiki/Genesis_(spacecraft)
But I always thought that catching stuff with helicopters was incredibly dangerous especially as the mass of the thing increased. So it's one thing to catch film canisters and sample return canisters but quite another to catch rocket engines...
The guardian article has a picture of the discharge notice as well. Ends with the phrase " [patient] denies further magnets". Which I've assumed to be a sarcastic shortened form of: "He _said_ there were only 4 but, you know, we're dealing with someone who put 2 magnets up their nose and then put 2 more up there because he thought it would help"
I don't think they have said exactly but I believe that there are some differences between the engines so specific ones are required. e.g. not all can relight and possibly not all can throttle down low enough. I think the centre one is pretty much essential at landing time.
If you watched the re-entry burn there was a lot more swinging around than normal which suggests that the problem engine was either one of those 3 or had perhaps been damaged by the explosion(*).
(*) - If you watch a few seconds before the main engines shut down it certainly looks like something exploded - it was a bit fireball-ish...
250ms = 1/4s which I'd have thought was an eternity in the realm of atomic physics.
Perhaps this is more to do with thermal/fluid dynamics (which is presumably a bit more "physical world" speed) than the actual atomic interactions?
Still feels like quite a long time though. I mean, don't most car engine management systems operate on a 100ms timer for example?
I recall someone superimposed that ground-level abort test video onto the one where the Falcon 9 exploded during a static test (the one where the so-called "Facebook" satellite got destroyed). Maybe not very scientifically accurate but did seem to suggest that the capsule abort was sufficient to get clear, presuming that it triggered sufficiently quickly...
Given the light has to reflect off 3 not-intended-to-be-reflective surfaces, how powerful does the laser have to be? I get that the detector could be very sensitive but even that seems tricky. i.e. very sensitive to the laser return but not at all bothered by e.g. sunlight. But there is still going to be several orders of magnitude of loss which suggests that the laser output could well need to be eyesight threatening ...
I'd say the interesting bit was the mechanism to have them move around under their own power. As you suggest, there are probably easier ways to extract uranium from contaminated water. Could be that this is one of those situations where the research is rather academic (but worthwhile!) then it gets jazzed up a bit for the publicity with a token "it could be used for <X>!"
In an ironic twist there are two relevant events on that day you could be referring to!
October 28, 1971 (Thursday)
- The British House of Commons votes 356–244 in favour of joining the European Economic Community.
- The United Kingdom becomes the sixth nation to launch a satellite into orbit, the Prospero X-3, using a Black Arrow carrier rocket.
(I presume you meant the latter...)
a) it says no _employment_ contract. i.e. he is not an employee subject to standard notice periods, etc. There will be some other kind of commercial contract in place to pay him for services but this can have any kind of terms including "walk away without warning"
b) ditto (a). I think this is quite common (but not necessarily right or good) at this level - especially if they are directors for multiple companies
c) yes - this seems like the biggest of the red flags. It's a situation where they've made sure they personally can't lose if WeWork goes down. They still have the rent payments, the buildings and whatever payoffs they've put into their services (not employment!) contracts...
I'll have you know I'm very proud of my 15s of Fire Extinguisher practice where I was allowed (from a safe distance) to put out a Proper Fire (a safely contained gas burner in a far corner of the car park) ! I'm Ready! Bring the Burn!
But seriously, they were very insistent on the "you are not a fireman" and "only do this if it is very low risk" and "only use one fire extinguisher". Apparently it is very easy to get carried away and think "oh, just one more and I've got this!" and the Fire Brigade are a bit fed up with having to rescue people surrounded by 15 empty extinguishers rather than getting on with putting it out.
Well, that was part of the selection process! I recall one anecdote (possibly from the book "The Right Stuff") where they were testing one candidate (possibly John Glen) and he was strapped into the multi-axis spinning chair, carrying out tasks with smoke and flashing bright lights going on, when they dropped a ton of scrap metal onto a big metal plate right behind him. Apparently the only evidence that he'd even noticed was a single big jump on the heart monitor, then back to normal. Some later evidence that "the right stuff" didn't always work well when forming a larger crew but no doubt that at the start of the space programme, "calm under pressure" where "pressure = imminent death" was an absolute necessity...
Also, there is a hint that they are proposing that this could be mildly covert (e.g. the "length of a football field" comment) which could be slightly compromised by the need to hand out safety goggles first...
"Why do I need these?"
"Oh, no particular reason, just a precaution"
"Oh, right, sure..."
"Seriously, don't take them off though."
As soon as you start talking about your laser ionising the air (presumably that needs a decent power density) and then detecting the backscatter i.e. you either need incredibly sensitive detectors or need to increase the power some more, I'm starting to wonder if your laser is now a rather serious hazard to all eyes and even physical objects in the vicinity...
something like: "Excuse me while I do the embarrassing middle-aged man 'I Told You so' victory dance" ?
I'm pretty sure he used that phrase at his El Reg Lecture but no-one knows if he actually did it because we reflexively all closed our eyes just in case...
Regrettably, the document didn't say.
I don't know if Shania Twain and Taylor Swift count as "country" (but they are on the list of http://theboot.com/worst-country-songs/ ) I'd nominate "That Don't Impress Me Much" and "We Are Never Ever Getting Back Together" as being somewhat appropriate to the situation...
In an idle moment I read through some of the claim/counter-claim documents in this Autonomy vs. HP spat and this particular bit seemed to say quite a bit about the management of HP:
"Ms Whitman ... repeatedly adopted the management approach of ... playing country music to the meeting instructing the senior executives attending to take the meaning of the country music songs and apply them to their own management methods".
I think I have read an article about this somewhere ( I will attempt to find it ) but pretty sure the answer was a lot - in a "1.21 GW? Great Scott!" kind of way. With, reference to a_mu's comment, it was "if you can lift a reactor big enough to provide it, you'd be better off just living inside the reactor shell - that'll shield you just fine" kind of size.
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