if we got all the cats in the world to meow at exactly the same time how loud would it be

Well the average cat meow is like 65/75dB (above speaking volume but below shouting) and there are about 2bn cats in the world, so, by that math, 130-150bn dB. Which is about 100 million jets taking off at once.

catastrophically loud

Great pun preceded by horrendous math.  Sound is summed by superposition. The actual formula for calculating the level difference when adding equal sound sources is:

∆L = 10 log n

where n is the number of sound sources.

Plugging in two billion (2x10^9), yields a level increase of 93 decibels.

If all the cats in the world meowed at the same time, and they were all in the same area, the sound would measure about 165 dB, akin to a  jet plane at take off.

(via pogorelowhat)

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)

Back in the day they really knew how to make educational videos. I have previously shown a video explaining water waves and, after posting footage from our new FlowViz wind tunnel, I came across this gem.

A simple explanation of camber, flaps, stall, separation and slots for a basic aerofoil. There are a whole heap of these videos on youtube, check them out if you want to find out more!

Ever notice how most science fiction only takes place in like, year 3000 or so? And it’s always pretty similar concepts: flying cars, interstellar travel and whatnot.

That’s all we can even come up with in our wildest imagination! There’s so much time after that to keep improving! The human race is gonna do things that we can’t even begin to fathom as we are now and I don’t know about you guys but that gets me pretty friggin jacked up

wugs:

jake the dog   (❍ᴥ❍ʋ)

and

| (• ◡•)|   finn the human

## The Summer Set Overtake Bowling For Soup Set; Cover “Girl All The Bad Guys Want”

The Summer Set crashed Bowling For Soup’s Warped Tour set this past weekend and took over for the band. They then covered “Girl All The Bad Guys Want.” Watch the video below after the jump.

The reason why the room was pink was because on black and white film, hues of red become dark shades of black. Pink is the perfect balance to give it that dark creepy grey.

PHOTOGRAPHY BITCHES

A related fun fact: while old black and white film was under-sensitive to reds, it was correspondingly over-sensitive to greens. Actors whose characters were meant to have unnaturally pale complexions - like Morticia Addams - would often take advantage of this by wearing makeup with a green base tint in order to make their faces “pop”. This is where the modern trope of cartoon vampires having green skin comes from.

These are some fun fucking facts

(via shhhandeattherude)

Artist Peter Cook, grew this living garden chair using tree shaping methods, primarily training a living tree through constricting the direction of branch growth. The chair took about eight years to grow.

he’s wearing crocs

He grew a tree into a chair. He can wear whatever the fuck he wants.

Gibson Les Paul Classic.

A scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die and a new generation grows up that is familiar with it

-Max Planck

I used to think there was no politics in science and boy I was dead wrong.

(via sixpenceee)

Interpretation of science is based on pretty much entirely normative questions, so it’s about as political as it gets