General Science / Re: Science Photo of the Week« on: 23/03/2023 14:55:27 »
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I heard thatHave you checked to see whether it does?
I can see why the evaporation of CO2 will reduce the temperature, with or without the ice.
Fortunately science can come to the aid of our ovine correspondent.
Those of us of a crystallographic or medical imaging persuasion spend a lot of our working lives in k-space where the infinite becomes infinitesimal and teeny weeny ripples in the microcosmos are big enough to see.
Any tourist who is overwhelmed by the Grand Canyon is welcome to visit the road from my house to the research park, and study hundreds of natural canyons formed by the confluence of British council officials, British contractors, and British weather. The canyons are just big enough to destroy an alloy wheel or kill a cyclist. There is an annual ritual of "closing the road" just before the end of the financial year, and a few months later a whole new crop of canyons appear, so it's much more dynamic than its transatlantic counterpart, which hardly changes from one century to the next.
I believe work is already in progress to reform the minute, and the abolition of the leap second has already removed one of life's uncertainties. There are however opposing views on the next phase: when I say "just a minute" The Boss starts nagging after 30 seconds, but when she says it, it means as long as it takes to complete a telephone call, feed the dog and change handbags. I think the compromise might be to lengthen the second.
AFAIK there are no ethical objections to resurrection, and there is even a choice of procedures. Christians of my acquaintance are certain that their entire bodies will be restored to life at some time in the future, and adherents of other faiths are certain that minds and spirits are routinely reincarnated on a daily basis, though not necessarily in the same species. So the broad consensus is that Sir Isaac may indeed already be present as a crab louse or tapeworm, or if not, he will turn up eventually at the same time as everyone else.
Yes indeed, these difficulties can be overwhelming to an ovine brain but they rarely trouble us anthropoid apes.oi ! cheeky chappy !! lol
Thank you Halc, so, even though we have no idea how large the unobservable Universe is, we can still take an educated guess and infer its existence , age and properties through indirect observations. woooooo !!!......How can we know it is 13.8 billion years old if all we can see is the observable Universe ?The age was not computed by looking as far as we can see. Hubble's constant of about 70 km/sec/Mpc was measured nearly a century ago, long before they were looking at things a significant percentage of the distance to the edge of the observable universe. The age can be computed directly from just that one constant.
There's about 3e19 km in a Mpc, so 70 km/sec/Mpc is the same as 2.3e-18 km/sec/km which, cancelling the km part, is 2.3e-18 sec-1
The reciprocal of that is 4.35e17 seconds which is 13.8 billion years.
Colin...nooooooooooo !!I assume that the meat content of that sandwich is thinly sliced mutton?Mmmmm, I just love a lamb sandwich.
Er, thinly sliced ?
Non doctored true-to-scale (1-1) bona-fide image of my sandwich just moments ago.Intriguing.
A publisher's photographer of my acquaintance reckoned to spend half a day to photograph a sandwich lunch to the satisfaction of the editors, and by the time they had added glosses, moisturisers, citric acid or sodium bicarbonate in all the right places, it was inedible.
They should have employed a sheep.
I assume that the meat content of that sandwich is thinly sliced mutton?
It's Nice to know You are still Alive n Kickin...
Especially after that Ancient Cakey Experiment!
P.S. - Remain a Sheep, no need to act like a Lab Rat.
If I have a stack of sandwiches to cut, I do them one at a time, cutting them all in one just squashes them. I cut by rolling the curvature of the blade, drawing the blade across them just tears.
The top slice stops all the loose bits from flying about when the knife tears them. It's a craftsman's trick to sandwich fragile materials between sheets of scrap plywood when cutting complex shapes.
Late in life I have discovered that a simple vertical press with a Chinese chef's chopper cuts sandwiches much cleaner than sawing with a bread knife.
Well for one, the only people I've known to cut the cheese do so between two buns.
That out of the way, it's probably because the hoagie roll provides a nice dry handle of sorts, providing a nice reaction force to what the knife is doing. Sans roll, you'd have to get the slimy parts all over the trotters, far more difficult to hang on.