Topic: physics

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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 to build a balancing bridge out of coins without glue

Build a bridge of coins that can balance off the side of a table without glue. This video from The Q demonstrates the stacking process with around 200 coins. Can you make something similar with fewer coins, or somethi...

A full circle rainbow as seen from a construction crane

High over St. Petersburg, Russia, from the top of a construction crane at the Lakhta Center, a huge rainbow can be seen in its full form: a circle. Phil Plait explains the science in his 2014 Bad Astronomy article: ...

Hummingbirds fly, shake, and drink in slow motion

First shared in the National Geographic feature A Mesmerizing Look at Hummingbirds in Flight, this high-speed video footage by Anand Varma captures these "perfect flying machines" as they fly, shake, and drink. The sl...

How to make a popsicle stick and rubber band paddle boat

Make a popsicle stick paddle boat that's powered with a rubber band. This DaveHax video shows us how cutting and gluing together some lollipop or popsicle sticks (and sanding them if you want it to have an extra fine ...

Hydrodynamic Levitation

Light balls, disks, and cylinders will levitate on a stream of water in a surprisingly off-center way. In this episode of Veritasium, Derek Muller teams up with Blake from InnoVinci, with some help from aerospace engi...

Haruki Nakamura’s surprising paper karakuri animals

Japanese paper crafter Haruki Nakamura designs mechanical paper karakuri-style animals that peek and pop in surprising ways. Karakuri, meaning 'trick' or 'mechanism', are mechanical automata pieces that were first mad...

What is Symmetry in Physics?

Symmetry is vital to understanding and predicting how our universe works. The relationship between symmetry and the mechanics of the universe is fundamental to physics. From Noether’s theorem to the new and exciting w...

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. ...

Sandwich Bag Fire Starter

The intensity of sunlight on Earth is about 1300 Watts per square meter. When you focus the sun's rays using a magnifying glass (or in this case sphere of water) you can increase the intensity roughly ten thousand fol...

A Japanese ‘Pythagoras Switch’ Rube Goldberg Machine for charity

This awesome Pythagora Switch / Pitagora Suitchi clip launches with a table tennis serve and takes off into chain reactions and table top engineering wonders galore. See ping pong balls, tape rolls, marbles, and metal...

Why don’t perpetual motion machines ever work?

Perpetual motion machines — devices that can do work indefinitely without any external energy source — have captured many inventors’ imaginations because they could totally transform our relationship with energy. Ther...

DIY Ferrocell: How to make a magnetic field viewer

By squishing a mix of mineral oil and ferrofluid between two sheets of glass, diligently squeezing out the air bubbles, sealing the edges, and then lighting it with a LED strip, Magnetic Games has created a DIY magnet...

J is for Joule – Circuit Playground

Learn all about work (as defined by physics) and the Joule, a unit of energy measurement, with Adabot and English physicist James Prescott Joule (1818-1889). A summary from Universe Today: An apple is a favorite e...

1953: Preserving and operating a wimmenumermolen polder mill

In a 250 year old polder mill in Noord Holland, Eric Zwijnenberg pumps excess water out of the area to avoid flooding. The drainage mill was first rented by his parents as a summer vacation house in 1953... After ...

Water powered hammer (Monjolo) – Primitive Technology

For farmers, millers, engineers, and artisans who live near a river or stream, a monjolo or kara-usu—a water powered hammer—can slowly grind grains into flours or soft stones into powders without repetitive human effo...

Creating The Never-Ending Bloom: John Edmark’s spiral geometries

Artist, designer, inventor, and Stanford professor John Edmark creates sculptures that are driven by precise mathematics, but his interest in spiral geometries is driven by something more enigmatic... "a search for un...

How Do Pelicans Survive Their Death-Defying Dives?

Unlike American White Pelicans, who scoop up fish at the water's surface, California’s brown pelicans rocket down from the sky, plunging toward the ocean from as high as 65 feet. This episode of Deep Look explains how...

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