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Topic: air pressure
Hydrophytes, 4D-printed aquatic ‘plants’ for the future
Tentacles wiggle. Filaments expand. Tails spiral. Looking like coral polyps, sea pens, crustaceans, and other colorful aquatic lifeforms, these multi-material 3D printed 'plants' come alive. Triggered by air that's pu...
Liquid Printed Pneumatics: 3D printing stretchy silicone structures
Imagine 3D printing a balloon of sorts, a stretchy material that can expand or contract with the air that's pumped into it. MIT’s Self-Assembly Laboratory, in collaboration with BMW, has developed a new way to print s...
How a kingfisher, an owl, & a penguin helped redesign Japan’s Shinkansen
How is Japan’s Shinkansen, a long-nosed bullet train that travels up to 240–320 km/h (150–200 mph), like a kingfisher? Or an owl? Or an Adélie penguin? In this video from Vox and 99% Invisible, we see how these three ...
Demonstrations of the Coanda Effect
Fluids flowing near a surface tend to follow the shape of the surface. Using Schlieren optics, we can see this behavior. It is known as the Coanda Effect and its explanation depends on viscosity, the frictional forces...
How Ingenious Animals Have Engineered Air Conditioning
Termites, prairie dogs, and people are all great builders, each in their own way. We all share one crucial problem: Put a bunch of us in a closed space, breathing oxygen in, breathing CO2 out... it doesn't end well. ...
Oxygen’s surprisingly complex journey through your body
Oxygen forms about 21% of the air around us. In your body, oxygen forms a vital role in the production of energy in most cells. But if gases can only efficiently diffuse across tiny distances, how does oxygen reach th...
A tiny balloon-powered organ made from paper & cardboard
With the exception of a piece of plastic that allows a peek at its inner workings, and a large balloon that provides required wind through its pipes, this tiny pipe organ is made out of paper and cardboard. It was des...
What happens when you put marshmallows in a vacuum?
Thanks to this hand pump vacuum sealer demo, we can see how these four fluffy marshmallows will react when the air is pumped out of their clear container. Poof, poof, poof! What's going on here? From Physics.org: ...
How to Make a Cloud in Your Mouth – Physics Girl
To make a cloud in your mouth -- yes, this is a very cool trick that actually works with practice -- you'll need to make tiny water droplets in your mouth. Then up the pressure. Physics Girl Dianna Cowern demonstrates...
The Wanamaker Organ – The world’s largest musical instrument
A Philadelphia treasure, get a glimpse inside The Wanamaker Organ, a 7-story-high, 287 ton, 28,677 pipe instrument located inside the Macy’s (formerly Wanamaker's) at 13th and Market. The pipe organ is the world's lar...
What’s the Loudest Possible Sound? – It’s Okay to Be Smart
"What is the loudest possible sound? What about the quietest thing we can hear? And what do decibels measure, anyway?" This video from Joe Hanson and It's Okay to Be Smart dives into the wide ranging and incredibly se...
Dancing Paper, 8bit Harmonica, and Musical Umbrella by Ugoita
The next time we start folding origami cranes, we're going to be tempted to give them legs and little magnetic feet. This is Dancing Paper, a project by multimedia artist Ugoita. Watch as the cranes dance with synchro...
Sticky Actuator: Inflatable stick-on “pouch motors”
Here's an excellent idea for your DIY projects: Make sticky actuators! These particular actuators -- motors that convert energy into motion -- are small, inflatable pouches that are custom-printed in thermoplastic...
Giant wingtip vortices in the fog as an airplane lands
An invisible but universal phenomena, huge wingtip vortices can be seen in the twisting fog as this airplane lands in Zurich, Switzerland. Wingtip vortices are strong spirals of air that are created when high pressur...
What is wind? – It’s Okay To Be Smart
We were just watching how wind (and so many other things) can get going with the spin of the Earth, now let’s go deeper and find out more about what wind is with PBS’ Dr. Joe Hanson of It’s Okay To Be Sma...
What on Earth is spin? – TED Ed
What on Earth is spin? And why is it so special? In this TEDEducation video, educator Brian Jones explains how this dynamic affects our lives in all sorts of ways. There's a surprising ...
Harvard’s Soft Robot Walking and Crawling
This isn’t like the robots we usually feature. This robot is soft and “boneless,” so to speak, like a squid, or starfish, or worms. Created by researchers at Harvard, this ro...