Physics on Etsy!

Matsuyama's Paradox

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From Etsy: BUY NOW: Missing Square Puzzle

Matsuyama’s Paradox: dissect a large square in to four equal quadrilaterals, rotate and reassemble- to find a small square is missing! Where did the additional area come from? Fun math involved in the design of this puzzle, which illustrates how the concept of area can often challenge our intuitions. Swipe to compare the two assemblies. A precision crafted puzzle by Jeux Efcé game shop. Wikipedia has good details: Missing square puzzle

Pikachu Phonotrope Spinner

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From Etsy: BUY NOW: Pikachu Animation Spinner

Phonotrope Spinner: When viewed through video from a smartphone an animated Pikachu springs into motion. The laser cut and printed acrylic is specifically designed to interact with the frame rate of the video process, similar to the animation effect of a flip book, but in a repeating cycle. The effect can also be seen without a camera by using a mirror and viewing through the spaces between the cutouts (swipe to see demo which looks much better in person)- using a mirror like this turns the spinner into a phenakistiscope, the 1833 invention that started moving media animation that lead to the development of movies and video. 


Nixie Tube Clock V2

The Nixie Tube Clock in the video is of amazing craftsmanship- real hardwood with brass accents and solid construction. Get one from this excellent shop: 
From Etsy: BUY NOW 
Nixie Tube Clocks 

Nixie Tube Clock V2: long before there were 7 segment LED displays there was the Nixie- cold cathode tubes with a wire mesh and 10 cathodes shaped in the form of numerals 0-9 that illuminate through neon glow discharge. The “Numeric Indicator eXperimental 1” or NIX 1 was introduced in 1955 by Burroughs Corporation and manufactured until the 1990s. This clock uses modern electronics to power Russian versions called the ИH-12A where the numbers are stacked so the front symbols obscure each lighted cathode minimally: from back to front 162750483.

Heritage Periodic Table: Collector's Edition

The Collector's Edition Periodic Table with 85 element samples: 
From Etsy store ProtoshopLLC : BUY NOW 
Heritage Periodic Table

The Heritage Periodic Table: Collector’s Edition- a comprehensive collection of the chemical elements that can fit in the hand. Embedded in acrylic are actual samples of 85 of the 118 elements- including pure gasses and reactive alkali metals in glass ampules- and represented by 80 high purity samples (including a Gold nugget and liquid Mercury) and 5 compounds. Radium is included in the form of an antique watch hand, and the bead of Mercury rolls back and forth within its glass container. This spectacular table and collection is the creative work of Tim and Cory Marriott of Engineered Labs Protoshop LLC

Raketti Puzzle

Versions of this puzzle avaioable fron these sources: 
From CuriosityBox: BUY NOW Raketti Physics Brain Teaser
From Etsy: BUY NOW Raketti Physics Puzzle 

Raketti Puzzle: physics brain teaser- the challenge is to remove the cone topped cylinder from the hole without touching the bottom container (no fair using sticky tape or such). It can be done in a matter of seconds! The solution to this puzzle (like others featured here) relies on some fun physics principles. 


Sun Sculpture: Magnetic Field Lines of the Solar Corona

This wonderful 3D rendering of the Sun available here:

From Etsy: BUY NOW: Sun Sculpture

See more 3D laser astronomy/astrophysics sculptures here

Solar Sculpture: the paths of 5000 magnetic field lines etched into optical quality glass map the complex flow of plasma in the Sun’s outermost atmosphere replicating how the solar corona appeared on Oct 21, 2000. This sculpture is based on a sophisticated computer model from a group of research scientists at the Lockheed Martin Solar and Astrophysics Laboratory, and the rendering contains 300,000 etched points to create the image. A map of our wonderful and complex star that can be held in the palm of your hand.

 

Bismuth Maglev Rod

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From Etsy: BUY NOW: Bismuth Maglev Rod

Click here to see other diamagnetic toys and scuptures 

Bismuth Maglev Rod: Small magnets are trapped, suspended and floating, within the notch of a rod cast from the diamagnetic metal bismuth. Diamagnetic substances only have magnetic fields of their own when placed in an external magnetic field from another source- here the small floating magnet supplies the external field. Diamagnetic fields are pretty weak though, so a powerful neodymium magnet sits above the gap on the top of the rod, and its height is adjusted to help lift the small magnet against gravity. Another amazing creation by Ernie McElhannon of Element83.

Non-Circular Gears

Get these wonderful laser cut sets here (I only added some bright spray paint): 

From Etsy: BUY NOW: Non-Circular Gears

Non-Circular Gear Trains: a survey of a few designs using gears with some interesting shapes that can produce variations in rotation speeds. Swipe to view: two oblong gears, four squircle gears, and two logarithmic spiral gears. Just a small sample of the infinite possible shape combinations and arrangements of non-circular gear sets. With thanks to the Jeux Efce shop for sending me these wonderful laser cut gears and mounts. 


Lissajous Roller 

Available from Pyrigan & Co.

From Etsy: BUY NOW: Lissajous Roller Illusion

Lissajous Roller: when viewing this 3D printed object from the side one sees a projection of a 3:2 Lissajous curve, but the object is actually cylindrical in frame and can roll towards or away from the viewer. When in motion a “dual axis illusion” is produced where the object appears to be rotating about a vertical axis. Invented by Bill Gosper and produced by Pyrigan & Co. 

Interactive Logic Gate Display

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From Etsy: BUY NOW: Interactive Logic Gate Display

Interactive Logic Gate Display: the most basic four binary/Boolean logic operations that are the fundamental components of modern computers- presented here appropriately on a standard green printed circuit board (PCB) complete with the truth table for each device. These logic gates are the basic building blocks of any logic circuit, from multiplexers, arithmetic logic units, and computer memory to full microprocessors which may contain hundreds of millions of such gates on a microchip. An educational, elegant, and fun design by Tyler Jacobs. 

Chil Balance Sculpture

This elegant design comes ready to assemble in your choice of four colors:

From Etsy: BUY NOW: Chil Balance Bird

Chil Balance Sculpture: the mass and orientation of the wings creates a center of mass below this sleek bird's beak- making a system that will rotate and oscillate about a stable equilibrium. No magnets! An elegant sculpture by artist Bin Xu of BinDesign that comes ready to assemble complete with stand,


Four Marble Puzzle

Get this well crafted puzzle from Creative Crafthouse here: 
From Amazon: BUY NOW Crossroads Four Marble Puzzle 
From Etsy: BUY NOW Four Marble Puzzle 

Four Marble Puzzle: physics brain teaser- move all four marbles to their corner locations simultaneously. Each slot slopes down towards the center such that the marbles tend to stay at the center- so, how would one get them to roll outward at the same time? The solution to this puzzle (like others featured here) relies on some fun basic physics principles. Answer below and swipe to reveal solution. A beautiful and well-made puzzle from Creative Crafthouse. 

Impossible Bolt

Only available from these aritist/craftsmen: 

From Etsy: BUY NOW: Impossible Bolt & Nuts

Impossible Bolt: one nut threads on clockwise as normal- the other threads on counterclockwise on the same bolt! Not impossible- but carefully engineered and machined. Swipe for partial hint on mechanism. This puzzling curiosity was inverted by Scott Eliott and machined in solid brass by puzzle crafters Steve Nicholls and Ali Morris of TwoBrassMonkeys.

Colored Ferrofluid Display Cells

Available on Etsy: BUY NOW Motion Ferrofluid Sculpture 

Colored Ferrofluid Display Cells: spectacular metallic blue, gold, and black display cells by czferro - colloidal ferromagnetic liquids in a specially prepared water-alcohol suspension. Curious behavior results from the interplay between magnetic force and surface tension. The gold and blue coloring appears to be from a thin coating at the boundary between the ferrofluid and the suspension liquid. Still exploring the details of the coloring and the specific makeup of the clear suspension fluid - both trade secrets it seems. 


Aristotle's Wheel Paradox 

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From Etsy: BUY NOW: Aristotle's Wheel

WIkipedia has some details on the Wheel "Paradox"

Aristotle’s Wheel “Paradox”: How does the smaller attached disk travel the same length as the larger one if both disks only make one full rotation? Note the shorter path of the smaller disk, if rolled on its own. This beautifully made demonstration depicts an issue of geometry and motion that perplexed the best minds of humanity for 2000 years. The ancients knew the formula for circumference, and C=2πR for the large disk is clearly greater than C=2πr for the smaller- so how could the smaller disk, rotated once, still travel the distance of the larger one if attached? The great Galileo even offered a solution to the problem in his book Two New Sciences, where he approximated the situation as concentric hexagons and considered the limit as the number of sides increased. So what is the best answer to make sense of this situation?

Flippe Puzzle Ball

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From Etsy: BUY NOW: Flippe Puzzle Ball

Flippe Ball Puzzle: this ball is a puzzle that explodes and flies apart when spun. The puzzle is made of three identical pieces and a ball bearing which mysteriously locks the pieces together only to release them after a period of spinning. The main challenge is to fully explain why this spontaneous disassembly occurs. Swipe to see a slow motion boomerang loop of it coming apart- and how conservation of momentum has the three equal mass pieces on equally spaced trajectories (120°) with the ball bearing remaining stationary at the center. A product of puzzle master George Bell.

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