What happens when you pour molten aluminum on dry ice? As the Backyard Scientist shows, you get what looks like slippery, sliding, boiling metal. In fact, what you see may remind you of the Leidenfrost effect, where a liquid can slide around over an extremely hot surface on a thin film of its own vapor. Despite the opposite temperature extremes–this is a very cold surface rather than a very hot one–a very similar thing is happening here. The molten aluminum is so much hotter than the dry ice that it causes the dry ice to sublimate, releasing gaseous carbon dioxide that the aluminum slides around on. For the same reason, the aluminum appears to boil in the bottom animation. What we’re really seeing is carbon dioxide gas rising and escaping the aluminum so violently that it carries some of the metal with it. Be sure to check out the full video for more awesome physics! (Image credit: The Backyard Scientist, source; via Gizmodo)
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We’re going to do something a little different for this week’s Free Tee Friday. As many of you know, this week we released a HUGE collection of sublimation tees, and we just can’t get enough of them! That’s why, for this week’s Free Tee Friday, one lucky reblogger will get to choose a sublimation tee of their choice. That’s 24 tees to choose from!
Reblog this post for a chance to win, then head on over to shop our Memorial Day Sale - where all tees and tanks are just $14 and everything else is 30% off!
The animations above show a little of what happens when you pour a spoonful of liquid nitrogen onto a container of gasoline. A couple of things are happening simultaneously here. First of all, the liquid nitrogen is experiencing the Leidenfrost effect. Because of the extreme difference in temperature between the gasoline (~20 degrees C) and the liquid nitrogen (-196 degrees C), part of the nitrogen is evaporating immediately, creating a vapor layer that insulates the remainder of the liquid nitrogen and allows it to float above the gasoline surface. The same thing happens to water drops on a very hot skillet.
The extreme cold of the nitrogen also seems to have formed some ice that’s further protecting the nitrogen drop. I’m not 100% sure what that would be made of, though – a mixture of water and gasoline?
Finally, there’s the simultaneous evaporation of the liquid nitrogen and the sublimation of the ice. This is the white vapor we see propelling and spinning the ice/drop. Note the “bounce” that happens in the top animation. The drop never actually impacts the wall. When it gets close, the escaping vapors are affected by the wall and start pushing the drop in a new direction! Check out the whole video below. (Image credit: carsandwater; via Gizmodo)
We are the strain and stress of a line,
the poem’s tension singing in each black wire
of words, and between the first line and the last.
We are the angle of light that burns water,
the point of intersection that creates perspective.
I’ve never let myself describe you
and now that there’s no time left
your meaning spills out of me
like the essence of an atom cracking
on the edge of speed’s bowl,
liquid in its longing to become part of something else,
Last night I Iooked out
to the grocer’s across your street,
baskets of flowers lining the sidewalk,
trembling in the dark wind.
The gasp of paper and leaves
made me eighteen again —
nothing about the feeling had changed,
the ambush of longing October calls out.
I’m living proof
we don’t stop wanting
what we can’t have.
No matter where you are or
who you’re near,
we come up for air together.
No matter my pace or distance,
it’s you I surface to.
Anne Michaels, fragments from “Sublimation”, in Miner’s Pond
In warm weather, the morning dew is a well-known phenomenon; but in cold weather, we may get hoarfrost instead. Hoarfrost, like dew, forms on cold, clear nights when heat is released from the ground faster than it can be replaced. If the surface is above freezing, water vapor condenses into dew; if it falls below the freezing point, frost can form. If there is enough water vapor present, hoarfrost can form.
Here’s one our new tops, Grass Type. This design looks so pretty in person and the fabric is super soft and nice! It makes a great summer top. Hoping to do up a design for each Pokemon type at some point!
The raw reaction product what was an off-white crystalline compound with a melting point 50 °C was loaded in a test tube and left there for a few months. For now, these crystals formed at the wall what are perfectly pure 2-(trifluoroacetyl)pyrrole.
If this compound is left on a Petri dish for a day, most of it will sublime away.
Why Sherlock is freaking out at the beginning of THoB, AKA, ‘Now shut up and smoke’.
So… Why is Sherlock so very, very interested in smoking at the beginning of THoB? Smoking is a metaphor for sex and Sherlock is incredibly hard up for it, so to speak.
John, on the other hand, doesn’t smoke and is having no problems not smoking. As of the middle of ASiB John no longer has a girlfriend and does not get one until much after Sherlock’s, ‘death’. After his epiphany at Battersea with The Woman John no longer seeks out these desperate attempts at sublimation, he surrenders to what he has with Sherlock, platonic though it may seem.
In ASiB Sherlock seems jealous of John’s girlfriends; of Jeanette in particular since she is his then-current girlfriend and, unpleasantly for him, at their Christmas party. He seems to have kept careful track of everyone John has dated, better than John himself, even.
In that same episode it is also revealed that Sherlock seeks to know what kind of porn John watches and actively attempts to prevent him watching said porn. In THoB when Sherlock talks to Henry he reveals that he reads John’s emails to his girlfriends: poems, apparently. Here we see Sherlock being very invested and very involved in John’s emotional/sexual relationships/feelings. In ASiB while John is still dating, Sherlock appears to be keeping his desire in check. In THoB, now that John no longer has a girlfriend, he is losing his mind.
Part of Sherlock’s deduction of Henry involves smoking: the latter is dying to smoke (as is he) but Henry has not quit, he is allowed to have a cigarette. And watching him smoke helps Sherlock to sublimate his own desire to do so,
If we take this situation as symbolic of what’s going on with Sherlock and John, then we can see that when John has girlfriends this creates a sort of outlet for Sherlock. At least if someone is having a relationship with John then he can somehow live vicariously through them: keeping close tabs on the relationship, possibly imagining himself in the place of his current girlfriend. Despite his resentment, these women fulfill a very important role in Sherlock’s life, that of proxies. They also help to neutralise his desire by keeping John unavailable.
I see John’s bisexuality as ACD’s cover for the Johnlock love. Mary/other women can be his beard(s) but this is made possible only by John’s status as a man who is capable of opposite-sex attraction. Just as I see Sherlock’s genius as ACD’s cover for their love, it hides a significant amount of John’s love under the guise of, ‘admiration’, and allows Sherlock to have his own mental-beard in the form of his archenemy: Moriarty.
Later in THoB Sherlock will go as far as to set John up on a date to push this issue. Things are easier for Sherlock when John’s unavailable just as things are easier for John when he thinks Sherlock is, ‘a machine’. It’s easier for Sherlock to keep his feelings and desires in check if John is dating. It’s easier for John to keep his feelings and desires in check if Sherlock is not really human, anyway.
Our newest sublimation tee, the beautiful and strange “Nuclear Garden” design by Ronnie Tres Reyes is this week’s Free Tee Friday feature! Reblog this post by 10AM on 2/10 for a chance to win this tee in your size!