73 results for: forces

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An unexpected way to inflate a balloon – Numberphile

The kamifusen is a traditional Japanese paper (kami) balloon (fusen) toy that became popular in the 1890s and can still be found in a variety of designs or...

How does your body know you’re full?

...almost impossible to ignore. After you’ve reacted by gorging on your morning pancakes, you start to experience an opposing force: fullness. But how does your body actually know when you’re...

A microgravity demo in the Willis Tower Skydeck elevator

The next time you ride an elevator down 103 floors, take a scale with you, because you might want to try this microgravity experiment: In collaboration with Willis...

Demonstrations of the Coanda Effect

...its explanation depends on viscosity, the frictional forces between the molecules of a fluid (be it liquid or gas). The Coanda effect is the culprit behind many everyday incidents as...

Hydrodynamic Levitation

...third law, the force on the water by the ball is equal and opposite to the force of the water back on the ball, pushing it up into the stream....

Step into a summer igloo (in 360°) as it’s being built

...on a parabola, not a semicircle, eliminating the forces that would make a true hemisphere bulge and collapse. Snow is an excellent insulator, trapping air between the snowflakes, while white...

J is for Joule – Circuit Playground

...weighs approximately one Newton. Thus, you’d have to exert a one Newton upward force to counteract its one Newton weight. Once you’ve lifted it up to a height of one...

How Do Pelicans Survive Their Death-Defying Dives?

...of its bill is essential, reducing “hydrodynamic drag” — buckling forces, caused by the change from air to water — to almost zero. It’s something like the difference between slapping...

Why the Giant Sequoia Needs Fire to Grow

...how a destructive force is necessary for new life in this clip from Nature on PBS. Some background from nps.gov: In the early 1960s, Dr. Richard Hartesveldt explored the...

Almost-invisible hydrogel robots that can grab quickly

...a similar level of transparency, force, and speed.” The researchers envision a future where these hydrogel robot parts might help in medical operations or work as unseen underwater robots. File...

What can you do with a large neodymium magnet?

Neodymium magnets are really strong. The larger they get, the more careful you need to be to avoid being pinched or struck from the force of their attraction. This...

The toy-inspired Paperfuge, an innovative new tool in healthcare

...samples of the patient’s blood, urine, or stool in a centrifuge. Thanks to centrifugal force, the spinning motion separates cells of different weights—such as pathogens in the blood—from the rest...

Why are Dalmatians the Traditional Dog of Choice at Firestations?

...of a boiler which was able to use steam to force water out of hoses and onto a fire. The fire brigade’s horse-drawn carriages would be loaded up with the...

(Skate)ology & The Science of Skateboarding: Grinding

Kick flips, nose grinds, backside board slides… (Skate)ology! Examine gravity, friction, momentum, and other physics concepts thanks to skateboarding demos by pro skaters Boo Johnson, Dane Vaughn, Marquise...

Barrel Tiled Shed & Tiled Roof Hut – Primitive Technology

...them dry enough to be moved, then take them to the tiled hut where they were force dried on the ondol (fire heated bed). The majority of the time spent...

3D-printed Metamaterial Mechanisms

...which is to shear. Unlike the rigid cell, this shear cell is designed to deform when a force is applied, more specifically to shear, which allows for controlled directional movement....

One Year on Earth – Seen From 1 Million Miles

...Related reading via Kottke: Lagrangian or ‘L’ points — “where the gravitational forces and the orbital motion of the spacecraft, Sun and planet interact to create a stable location from...

MVP Stephen Curry’s Ultimate Career Mixtape (2016)

...of 72-10), Stephen Curry is a force on the court. This NBA supercut of his most amazing moves shows some of the reasons why. Of the MVP honor, the second...

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