The difference will not be very large (varying by about 0.5%), but it's a counter argument to the comment about 99.99999999% of the people who have ever lived being under 1g.
It's not actually. The value of 1g varies, that's all.
China announced last Friday it discovered a hitherto unknown mineral in samples returned from the Moon. The mineral, dubbed "Changesite-(Y)", was named after Chang’e – a moon goddess in Chinese mythology and the namesake of the Chang’e-5 mission that retrieved a sample of lunar dust in 2020. China's sample clocked in at 1. …
I disagree. When people say something "weighs" 1kg, they are making a statement about how much of it there is. That's what's important when, e.g., baking a cake or doing the shopping.
Scales will of course be calibrated to local gravity (as happens here on Earth, gravity is not the same - 1kg in, say, Greenland is about 0.5% heavier than that same kg in Ecuador). But it's still "1kg".
On the Moon, I'm guessing 1lb is quite a bit more than 1kg.
"No, technically it 'massed' 1.73 kg on the Moon as well, since kg is the SI unit of mass."
True, however it also 'weighed' 3.8lbs since, as everyone knows, a pound is a measure of force (like the Newton) and the actual imperial unit of mass is the slug.
Hmmmm... I sense an opportunity. El reg should add the slug as a unit of mass (e.g., 1 adult badger == 130.4347 banana slugs).
However, I note that el reg has also intermixed measures of weight and mass. We need a purifying revamp of the standards!
It's a little disappointing that it relates to Chinese mythology. I was hoping the new stuff found would have been given entirely random names: Changesite, Felicity, Seven, Trevor...
It would make science class much more interesting - today we're going to learn about the mineral "Myfanwy".
Helium-3, being a Fermion, should not exhibit superfluidity, a property of bosonic liquids. Helium-4 refrigeration below 2.17K is difficult because it goes superfluid and gushes through the tiniest of gaps, ask CERN....
<high voice> " we think the Helium is leaking"....
Of course, Fermions can pair-up, Cooper pairs, to make Bosons, and this is why electrons can become superconductors - and why, eventually, He-3 can become superfluid, but at a much lower temperature.
There has to be another mineral called Changesite that does not contain Yttrium...
I haven't been able to find the chemical formula ( which is strange, it has to be clearly defined for the IMA to accept a new mineral name ) but since there'es that trailing Y and it's a phosphate it at least contains the following elemen/complex : Y and PO4
now for a complete answer, I'm going to use a similar phosphate : merrillite and merrillite-Y
Merrillite : Ca8NaMg(PO4)7
Merrillite-Y : Ca16Y2Mg2(PO4)14
As you can see, the Yttrium replaced the Sodium in the formula...
"They found a single crystal particle among the 140,000 lunar sample particles with a diameter of about 10 microns."
Might this mean that the largest, of many particles, reached 10 microns. How many, smaller, particles were there? 0 or > 1 ? Disambiguation requested.
This might also account for the -Y, if more particles did have Y.
There is not a lot of helium-3 in lunar regolith (which is just the surface layer, and is the only layer that contains any at all) - it's in the tens of parts per billion at best. That means collecting and processing billions of tons of regolith for a few measly tons of helium-3, which isn't all that useful outside some niche extreme cryogenic applications. It's not a worthwhile fusion fuel - it produces less energy per fusion event than standard D-T fusion, and would be quite difficult to ignite and sustain (we don't yet know the Lawson Criterion (difficulty to ignite) for 3He-3He, but we do know it for D-3He and it's 16 times harder to ignite than D-T). The sole "advantage" is that 3He-3He is aneutronic, but the neutronic emission from D-T is actually useful for breeding more fuel.
People are constantly discovering new minerals. So what?
*Everything* on the surface of the Moon has a tiny bit of 3He in it. So what?
3He is a terrible fusion fuel; it's difficult to fuse. Sure, fusing doesn't make your reactor parts radioactive like Tritium does, but if you can't get it to fuse then so what?
Don't get me wrong: it's neat that they brought samples back from the Moon. But this is a tempest in a teapot, a transparent effort to get a headline.
"The UK's Imperial College has reportedly decided to shut down two Chinese-sponsored aerospace research centers after warnings they could unintentionally aid the Chinese military." UNINTENTIONALLY?
Here is BREXIT. Instead of being more independent, The UK is now essentially a US Colony. Instead of opening up global trade, the UK is closing it down on behalf of assisting the US to Nancy Kerrigan knee bash the Chinese at every turn.
If the US and UK can no longer compete just say so... The KneeCapping foreign policy of the US and its slave state the UK, is nothing more than the new low standard of LOSERSHIP.
It is repulsive to read a story about a great new discovery that is parsed with backhanded phrases minimizing the effort, then having the UK act in such an utterly stupid fashion on behalf of retrograde Murica... Murica is pegging the moron meter these days and UK has become it's trained ape.
Getting right down to the nitty gritty then, Lordrobot ..... whenever what you say is true of the UKGBNI, who is to blame and be held accountable for the disaster?
Members of Parliament in the Commons and House of Lords and their aiding and abetting Civil Servants? The Bank of England for supplying them with apparently limitless currency generating untenable debt and increasing deficits for payments of living expenses and lovely rewards? An ignorant and unwholly civilised population for tolerating and allowing such a mess to continue day after day without any end in sight? Or do you prefer to blame foreign powers over whom there are similar degrees of zero command and control and accountability ‽ .
Who/What might they be?
It’s all nothing less than a titanic disgrace, isn’t it? And I wouldn’t like to be discovered fundamentally responsible for that situation, for one doesn’t have to be an Einstein to know what the mob will do, with every right and justification, to that and those pulling their strings and the wool over their eyes so they cannot see what fools they are being taken for at every available opportunity.
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