fuckyeahfluiddynamics:

Wingtip vortices are a result of the finite length of a wing. Airplanes generate lift by having low-pressure air travelling over the top of the wing and higher pressure air along the bottom. If the wing were infinite, the two flows would remain separate. Instead, the high-pressure air from under the wing sneaks around the wingtip to reach the lower pressure region. This creates the vorticity that trails behind the aircraft. I was first introduced to the concept of wingtip vortices in my junior year during introductory fluid dynamics. As I recall, the concept was utterly bizarre and so difficult to wrap our heads around that everyone, including the TA, had trouble figuring out which way the vortices were supposed to spin. A few good photos and videos would have helped, I’m sure. (Photo credits: U.S. Coast Guard, S. Morris, Nat. Geo/BBC2)

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"I firmly believe in small gestures: pay for their coffee, hold the door for strangers, over tip, smile or try to be kind even when you don’t feel like it, pay compliments, chase the kid’s runaway ball down the sidewalk and throw it back to him, try to be larger than you are— particularly when it’s difficult. People do notice, people appreciate. I appreciate it when it’s done to (for) me. Small gestures can be an effort, or actually go against our grain (“I’m not a big one for paying compliments…”), but the irony is that almost every time you make them, you feel better about yourself. For a moment life suddenly feels lighter, a bit more Gene Kelly dancing in the rain."

Jonathan Carroll (via onlinecounsellingcollege)

(via slut-overload)

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vykin:

Sam, 2013

vykin:

Sam, 2013

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bryankonietzko:

[Aang] - [Katara] - [Sokka] - [Toph] - [Zuko]

So cool! “Do not regret growing older. It is a privilege denied to many.”

45,808 notes

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royeren:

jedavu:

Modern Remakes Of Famous Paintings by The Booooooom + Adobe 

Ok but that Van Gogh, tho

(via cthulhusenpaii)

133,734 notes

lizclimo:

HAPPY MOTHER’S DAY MOMS! 
now, for crying out loud - go back to sleep. 

lizclimo:

HAPPY MOTHER’S DAY MOMS! 

now, for crying out loud - go back to sleep. 

(via bryankonietzko)

16,497 notes

baltimoresportsreport:

Baltimore Ravens - 2014 NFL Draft Picks

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(Source: fandomaddict, via desmondjohnso)

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the-final-sentence:

Final sentences:

"Okay, baby, hold tight," said Zaphod, "We’ll take a quick bite at the Restaurant at the End of the Universe."

from The Hitchhiker’s Guide to the Galaxy

He put on a little light music instead.

from Mostly Harmless

There was a point to this story, but it has temporarily escaped the chronicler’s mind.

from So Long, and Thanks for All the Fish

He also heard the official from the Safety and Civil Reassurance Administration issue instructions that the planet in ZZ9 Plural Z Alpha must be made ‘perfectly safe.’

from “Young Zaphod Plays It Safe” in The Utterly Utterly Merry Comic Relief Christmas Book

728 notes

(Source: joedangerjonas, via communitythings)

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