# Topic:friction

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## A microburst drops heavy rain over Austria’s Lake Millstatt, a time lapse

See a microburst or downburst drop heavy rain in a thunderstorm over Austria's Lake Millstatt. The time lapse was captured by photographer Peter Maier from high above the scenery, allowing a clear view of the burst. F...

## Balanced bottle sculptures by balancing artist Rocky Byun

Balancing artist Rocky Byun has filled his YouTube channel with patience and practice. In his videos, he balances rocks, chunks of ice, bicycles, sticks and other objects, but perhaps his signature medium is the glass...

## 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...

## Dominoes and Fire

This friction and flame-filled domino video incorporates a series of tiny fire tricks into the chain reactions with the help of some matches, rubber bands, candles, sparklers, and strings. It was also both screenlinke...

## 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. ...

## How many nails can you balance on the head of one nail?

One large nail is securely nailed into a piece of wood. A handful of identical nails are laying on the table. How many of those loose nails can you balance on the head of that first nail? Try it, then watch knife ...

## Make Lissajous patterns with DIY sand pendulums or light

Sand pendulums are an easy and beautiful method for students of all ages to learn a bit about the harmonic motion. These devices are easy to build and can be adjusted to give a variety of patterns. A pendulum that beg...

## How to make Leonardo da Vinci’s self-supporting bridge

With a series of wooden poles and beams, "Stick-Boy" shows his Dad how to build Leonardo da Vinci's self-supporting arch bridge, also known as the emergency bridge. No nails, screws, rope, glues, notches, or other fas...

## (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 Henry, Ri...

## Science Extras from Jiwi’s (Rube Goldberg) Machines

A YouTube series that hearkens back to characters and situations from old silent films, Jiwi's Machines mixes a love for Rube Goldberg Machines with an ode to comedy greats like Charlie Chaplin or Buster Keaton. T...

## Making a cord drill & pump drill from sticks & rocks

How far can you go without using modern technology? As a hobby, YouTuber Primitive Technology explores this question by making simple tools from scratch using no modern tools or materials. In the video above, he craft...

## Why do autumn leaves cause train delays? – Liz Bonnin

Why do 'leaves on the line' cause train delays, especially in autumn? The serious danger comes from a series of physics challenges: Leaves are sucked onto the tracks by the fast moving trains. The train wheels crush t...

## Why do spinning rings & spinning disks have different paths?

In this silent video from Science Magazine, we can see how a spinning disk and a ring create two different paths while spinning. Try it at home. Do you see the same result? David Schultz at ScienceMag.org explains: ...

## Andrew Gatt’s Ultimate Paper Roller Coaster

Perfect for the classroom or at home, Andrew Gatt's paper roller coasters are not only fun, but they also teach so many lessons in engineering, construction, teamwork, trial and error, and more. In exploring physics a...

## How to Observe a Meteor Shower – Cal Academy

Get some blankets, find a dark hill on a dark night, make sure you've napped, and put away that smartphone. The California Academy of Sciences has some excellent tips for seeing shooting stars, more accurately known a...

## How to make a Crazy Pool Vortex – Physics Girl

Have a plate, a pool, and some food coloring? In this experiment, Physics Girl Dianna Cowern makes strange black circles form by briefly dragging a plate through the pool. On a sunny day in still water, those black ci...

## Andrew Gatt’s Paper Roller Coasters

Mixing physics, engineering, paper and what looks like some seriously rewarding folding, cutting and taping DIY, Andrew Gatt builds incredibly sturdy paper roller coasters out of heavy paper s...

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