One of the most vexing topics for fluid dynamicists and their audiences is the subject of how wings generate lift. As discussed in the video above, there are a number of common but flawed explanations for this. Perhaps the most common one argues that the shape of the wing requires air moving over the top to move farther in the same amount of time, therefore moving faster. The flaw here, as my advisor used to say, is that there is no Conservation of Who-You-Were-Sitting-Next-To-When-You-Started. Nothing requires that air moving over the top and bottom of a wing meet up again. In fact, the air moving over the top of the wing outpaces air moving underneath it.
In the Sixty Symbols video, the conclusion presented is that any complete explanation requires use of three conservation principles: mass, momentum, and energy. In essence, though, this is like saying that airplanes fly because the Navier-Stokes equations say they do. It’s not a terribly satisfying answer to someone uninterested in the mathematics.
Part of the reason that so many explanations exist – here’s one the video didn’t touch on using circulation – is that no one has presented a simple, intuitive, and complete explanation. This is not to say that we don’t understand lift on fixed wings – we do! It’s just tough to simplify without oversimplifying.
Here’s the bottom line, though: the shape of the wing forces air moving around it to change direction and move downward. By Newton’s 3rd law (equal and opposite reactions), that means the air pushes the wing up, thereby creating lift. (Video credit: Sixty Symbols)
The massive downside to meaningful action on climate change is that if global warming is false were left with a clean environment and a sustainable economic model. What a bummer
It started when I was in kindergarten, and I was so proud I did not have to go to Bingo class, unlike my friends, because I could speak good English -
although I had no idea what a yellow dog that could spell had anything to do with Chinese.
(I figure out now that it was probably called Bilingual class)
I am lucky. I speak the fluent, accentless English of newscasters, the dialect spoken by the children of immigrants, that we learned not from our parents but rather from watching Sesame Street and other things on tv.
Last year, a white facebook friend of mine posted, “In order to celebrate Chinese New Year, me talk rike chinese man arr day.”
And then told me that she was “sorry I was offended” and “she didn’t mean anything by it” when I (nicely, sweetly) told her that that shit was not okay. She said that she saw it the same as doing an accent, like Irish. Or British. Or Italian. (for bonus points, she even said that she has lots of Asian co-workers and friends, and LOVES Asian people, and so is not a racist.)
And when one of my white friends gets drunk, he thinks his “Asian accent” is hilarious.
And I was told by a coworker about the time my Asian coworker mispronounced “Barroway” as “Bwawwoway” and how hilarious it was.
Here’s the thing - can you guess how many Asian people I know who actually say
me rikey
me from _____
me so solly
(or, if you like, the fetishized versions: me so horny, me love you long time)
if you said ZERO, then ding ding ding! Congratulations, you have working brain cells.
No, my misguided fb friend, the “Asian accent” is not an actual imitation of an accent, comparable to your bad British/Irish/Italian - but rather a mockery of Asian people and their supposed inability to speak English. It is the perpetuation of the image of Asian people as perpetual foreigners in America.
Like that time when my family was at an Italian restaurant, and we were speaking to my father in Cantonese, and a drunken white lady said very loudly, “GOD when you come to this country at least learn the language!”
Or when my father was pulled over for speeding, and although he said “what’s the problem, officer?” the first thing the state trooper said was, “Do you speak English?”
Your fake “Asian accents” are not harmless and silly, because at the root of the joke, it says - you, you are stupid. You cannot speak English. You are Other. You do not belong.
my parents have been in this country for 30 years. They have been American citizens for 30 years.
And they are very self-conscious of their imperfect English, afraid that it makes them look ignorant, knowing that it marks them as immigrants. That, after 30 years, you can still be told (in not so many words) that you do not belong.
The Cultural Revolution started in China when my father was 13. He was pulled out of school and, later, sent to work in the fields. (He escaped to Hong Kong when he was 18, but that is another story for another time.)
When my father came to this country, he had a middle school education and did not speak a lick of English. He worked as a busboy at a Chinese restaurant, the evening shift that ran until 3 or 4 in the morning, and went to school during the day.
It took my father ten years to earn his bachelor’s degree. He is now an engineer.
Is this not your “American Dream?”
When my mother came to this country, she spoke very little English. She got a job as an entry level clerk. Over the years she earned one promotion after another. She is now management at a large federal agency, and manages funds for the whole state.
Is this not your “American Dream?”
And my father didn’t understand why his coworkers said, “flied lice, flied lice!” to him over and over and laughed.
And my father is still afraid to speak in a professional setting, even when he has ideas.
And my mother still checks and double checks her professional e-mails with me, for fear of mockery from the same people she manages.
And people don’t understand why I can’t take a harmless joke. Why I don’t think that shit is funny.
No, I don’t “rikey.”
No, I won’t “love you long time.”
And no, I’m not sorry.
So, please, kindly - FUCK OFF.
Reblogging this for, like, the fiftieth time because it has never stopped being relevant to my life and it always, always breaks my heart.
It’s not funny. It’s not okay. It’s not harmless. It’s alienating and hurtful.
In some black communities there’s still a stigma that kinky or coarse hair is “bad”, which couldn’t be further from the truth. There’s no such thing as good or bad when describing someone’s natural hair texture or type. To those struggling to love and accept their natural hair because of societal pressures, remember this - straight, curly, kinky or wavy, it doesn’t make a difference. Embrace your hair the way it is, no matter what society tells you. All hair is good hair. It’s your Crown.
