Perhaps there was no winner, as this was not a scored debate. Nevertheless by all, or a strong majority of, accounts, I bested him. The fundamental idea that I hope all of us embrace is, simply put, performance counts as much or more than the specifics of the arguments in a situation like this. I admit that, for me at least, it took tremendous concentration. I was and am respectful of Ken Ham’s passion. At a cognitive level, he believes what he says. He really means it, when he says that he has “a book” that supersedes everything you and I and his parishioners can observe everywhere in nature around us. I respected that commitment; I used it to drive, what actors call, my “inner monologue.” I did not choose, as I was advised, to attack, attack, attack. My actor’s preparation helped me keep things civil and be respectful of Mr. Ham despite what struck me as his thoughtless point of view. I’m sure it influenced the countless people who’ve written to me and come up to me in public to express their strong and often enthusiastic support. Thank you all.
Step by Step: A Great way of Painting your own Mural without Knowing how to Draw
A bill that would require craft brewers to sell their suds to a beer distributor and make them buy it back to sell at their own breweries has cleared a Senate panel.
The measure (SB 1714) has so infuriated craft brewers and beer enthusiasts that some on Twitter have christened it with the hashtag “#growlergate.” The Community Affairs committee approved the bill Tuesday.
Sen. Jack Latvala, R-Clearwater, was so incensed at the idea of craft brewers having to pay someone else to sell their own product that he likened it to a mobbed-up racket. Latvala has championed the microbrewery cause.
The requirement is similar to paying “protection to ‘Vinnie’ in New York,” he said.
The bill also is favored by the Big Beer lobby, which is feeling the heat from craft beer’s competition.
Well, this is a giant mountain of bullshit.
Ducks, boats, and other objects moving along water create a distinctive V-shaped pattern known as a Kelvin wake. As the boat moves, it creates disturbance waves of many different wavelengths. The constructive interference of the slower waves compresses them into the shock wave that forms either arm of the V. Sometimes evenly spaced wavelets occur along the arms as well. Between the arms are curved waves that result from other excited wave components. The pattern was first derived by Lord Kelvin as universally true at all speeds - at least for an ideal fluid - but practically speaking, water depth and propeller effects can make a difference. Recently, some physicists have even suggested that above a certain point, an object’s speed can affect the wake shape, but this remains contentious. (Image credit: K. Leidorf; via Colossal; submitted by Peter)
I started a new blog about the romance of finding old cars-here is the first post. If you like old cars, car culture or the mystery and fun of finding a diamond in the rough, this blog is for you. Follow and Share!
By the time this 1964 Porsche SC was built Porsche had been producing some version of the 356 for 16 years and 50,000 cars had rolled off the line. The Porsche Type 901 (later re-badged as the now legendary 911 to avoid a trademark conflict with Peugot) was already in pre-production and the 356′s days were numbered. Around 10,000 Porsche 356s were built in 1964, and Porsche had already earned the nickname ‘Giant-killer’ as the little two liter and smaller engined cars outdrove much larger engined cars on racetracks around the world. How many are left? Corvette produced over twice as many cars in 1964, and Ford introduced the Mustang as a 1964 ½ model that year with over 120,000 made! So again-how many 1964 Porsche Coupes are left? And how many were the Sport-Coupe models, the top of the range?
I can vouch that the History of Canada is entirely 100% accurate.
To believe in a universe as young as six or seven thousand years old is to extinguish the light from most of the galaxy. Not to mention, the light from all the hundred billion other galaxies in the observable universe.
Wil Wheaton for President!
Listen to Wil Wheaton's response to a young girl who gets made fun of for being smart. It's … what do they call it? Oh yeah, THE BEST THING.
Best of all, he doesn’t just remind her that it’s not her fault if she gets made fun of (it’s the bully’s fault) or reassure her that it will get better (it will) or show her all the beautiful parts of being a nerd (they are infinite). Wil does all those things and he tells he how she can use her passion and curiosity to extend a hand of kindness to the bully, to help them find their nerd thing.
And yes, that thing is probably tetherball, because everyone loves tetherball.
When I was a boy I was called a nerd all the time—because I didn’t like sports, I loved to read, I liked math and science, I thought school was really cool—and it hurt a lot. Because it’s never ok when a person makes fun of you for something you didn’t choose. You know, we don’t choose to be nerds. We can’t help it that we like these things—and we shouldn’t apologize for liking these things.
I wish that I could tell you that there is really easy way to just not care, but the truth is it hurts. But here’s the thing that you might be able to understand—as a matter of fact I’m confident you will be able to understand this because you asked this question…
When a person makes fun of you, when a person is cruel to you, it has nothing to do with you. It’s not about what you said. It’s not about what you did. It’s not about what you love. It’s about them feeling bad about themselves. They feel sad.
They don’t get positive attention from their parents. They don’t feel as smart as you. They don’t understand the things that you understand. Maybe one of their parents is pushing them to be a cheerleader or a baseball player or an engineer or something they just don’t want to do. So they take that out on you because they can’t go and be mean to the person who’s actually hurting them.
So, when a person is cruel to you like that, I know that this is hard, but honestly the kind and best reaction is to pity them. And don’t let them make you feel bad because you love a thing.
Maybe find out what they love and talk about how they love it. I bet you find out that a person who loves tetherball, loves tetherball in exactly the same way that you love Dr. Who, but you just love different things.
And I will tell you this — it absolutely gets better as you get older.
I know it’s really hard in school when you’re surrounded by the same 400 people a day that pick on you and make you feel bad about yourself. But there’s 50,000 people here this weekend who went through the exact same thing—and we’re all doing really well.
So don’t you ever let a person make you feel bad because you love something they decided is only for nerds. You’re loving a thing that’s for you.
Q:Hello there, I was just wondering if you could summarize the fundamentals of a quark. I've read about them, but I'm kinda fuzzy on their whole purpose & concept. Thank you much! :)
Here is a post that discusses the fundamental particles, including quarks, but I’ll do some quick bullet points for you as well.
- Quarks and leptons are the basic building blocks of matter (There are antiquarks and antileptons as well, but we’ll get to that later).
- Quarks combine to form particles known as mesons (a quark and an antiquark) and baryons (three quarks). Baryons include protons and neutrons.
- There are six types (called “flavors”) of quark: Up, Down, Charm, Strange, Top, and Bottom. Each flavor has a different charge. Only up and down quarks have been observed in nature; the rest have only been made in particle accelerators.
- Every flavor of quark has a corresponding “antiquark” which has the opposite charge (So, an up quark will have a charge of +2/3 while a down quark will have a charge of -2/3).
- Protons and neutrons are only made of up and down quarks. A proton has 2 up and 1 down, while a neutron has 1 up and 2 down.
- These up and down quarks are held together by gluons, which are particles that carry the strong force.
- Mesons, as I mentioned earlier, are composed of a quark and an antiquark. Because they are composed of a quark and its antimatter component, they exist only momentarily and destroy themselves rather quickly. Their decay leaves behind only energy.
Hopefully that helped break things down…there’s a lot more but this could get very long and tiresome to read if I tried to include everything!
The sine and cosine functions for the circle, as every student should see them.(Edit: the animation is also available, without watermark, at higher resolution and slower frame rate at Wikimedia Commons.)
HAPPY PI DAY! To celebrate, here’s this long-due animation of the usual trigonometric functions, sine and cosine, geometrically defined in terms of the unit circle.
This is what the sine and cosine functions, the ones you are taught, really are in terms of the unit circle.
First, we have the unit circle (with radius = 1) in green, placed at the origin at the bottom right.
In the middle of this circle, in yellow, is represented the angle theta (θ), that we’re going to plug in our trigonometric functions. This angle is the amount of counter-clockwise rotation around the circle starting from the right, on the x-axis, as you can see. An exact copy of this little angle is shown at the top right, visually helping us define what θ is.
At this angle, and starting at the origin, we trace a (faint) green line outwards. This line intersects the unit circle at a single point, which is the green point you see spinning around at a constant rate as the angle θ changes, also at a constant rate.
Now, we take the vertical position of this point and project it straight (along the faint red line) onto the graph on the left of the circle. This gets us the red point. The y-coordinate of this red point (the same as the y-coordinate of the green point) is the value of the sine function evaluated at the angle θ, that is:
y coordinate of green point = sin θ
As the angle θ changes, we can see the red point moves up and down, tracing the red graph. This is the graph for the sine function. The faint vertical lines you see passing to the left are marking every quadrant along the circle, that is, at every angle of 90° or π/2 radians. Notice how the sine curve goes from 1, to zero, to -1, then back to zero, at exactly these lines. This is reflecting the fact sin(0) = 0, sin(π/2) =1, sin(π) = 0 and sin(3π/ 2) -1
Now, we do a similar thing with the x-coordinate of the green point. However, since the x-coordinate is tilted from the usual way we plot graphs (where y = f(x), with y vertical and x horizontal), we have to “untilt” it in order to repeat the process above in the same orientation. This was represented by that “bend” you see on the top right.
So, the green point is projected upwards (along the faint blue line) and this “bent” projection ends up in the top graph’s rightmost edge, at the blue point. The y-coordinate of this blue point (which, as you can see due to our “bend”, is the same as the x-coordinate of the green point) is the value of the cosine function evaluated at the angle θ, that is:
x coordinate of green point = cos θ
The blue curve traced by this point, as it moves up and down with changing θ, is the the graph of the cosine function. Notice again how it behaves at it crosses every quadrant, reflecting the fact cos(0) = 1, cos(π/2) = 0, cos(π) = -1 and cos(3π/2) = 0.
And there you go. That’s all there is to it. That’s what sine and cosine are. Simple, huh?
Now, while the concept itself is pretty simple, a lot of people get confused about what the sine and cosine functions actually represent, because visualizations such as this are not presented to them when they are first taught trigonometry.
A lot of teachers, and plenty of school books, fail to mention any of this in detail, as I tried to do here, instead throwing a bunch of formulas in front of students. But the geometric intuition, as presented here, is much simpler to grasp, much more useful in general, and will stick to you for life once you get it. The formulas and important values for sine and cosine don’t need to be memorized anymore, because now you should understand what these values should be, given the underlying logic of things. And that’s what math is all about: making sense of things so they are plainly evident to anyone.
In my most popular post to date (over 360 thousand notes as of now, holy crap!), I saw a lot of people commenting that seeing the top graph, which is the sine function for the circle, made all that trigonometry stuff click.
I was baffled. People were angry that no teacher has ever showed anything like that to them before. That’s crazy! At this age where computers are everywhere, this sort of thing should be in every classroom, and be seen by every student.
So, in order to do justice to the unit circle and these immensely important trigonometric functions, and in order to fill an obvious pedagogical hole in math classrooms and textbooks everywhere, I decided to finally make this animation. No fancy or crazy alternative takes on the sine and cosine this time, just the good ol’ pair of trigonometric functions we all should understand and love.
Happy Pi Day, everyone!