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PHYSICSFUN

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Showing 1–12 of 18 results
Green Uranium Glass Ball
New
Out stock

In the past, glass manufacturers added uranium to glass for color. Uranium has since become more strictly regulated, but the old uranium glass objects are still floating around. Because of the uranium content, these marbles glow bright green under ultraviolet light. ...

$5.00
Tube of 20 Neodymium Magnets
New
Out stock

Our mighty 4mm cubic rare earth magnets are incredibly useful, mesmerizing to fiddle with, and a steal for only 5 bucks for a tube of 20. We had these custom manufactured to the highest magnetization the factory could concentrate into...

$5.00
Aerogel
New
Out stock

Aerogel is one of the most impressive materials humans have created...so far. This vial contains 25mL (approximately 1 heaping handful) of silica aerogel particles—the world's lightest known solid material. Commonly called "frozen smoke", it is safe to touch, hydrophobic (repels...

$16.00
Storm Glass
New
Out stock

Originally made famous by Admiral FitzRoy, the captain of the HMS Beagle which Charles Darwin made his renown voyage upon, this sealed glass contains a solution that can form various crystalline structures, even filling the glass at times. This behavior...

$15.00
Rattleback
New
Out stock

A rattleback is a type of spinning top that prefers to spin in one direction due to its unique semi-ellipsoidal shape. When spun in the wrong direction, it will automatically shift the momentum until it spins the opposite direction. This...

$2.50
Water Beads
New
Out stock

These tiny beads are made of a super absorbent polymer that can soak up a surprising amount of water. Plus, since they are almost entirely water when full absorbed, they have the same refraction index as water and become invisible...

$3.00
Tungsten Black Hole Model
New
-13%
Out stock

WE LAUNCHED THIS PRODUCT ON KICKSTARTER AND IT WAS FUNDED OVER 200% If you compress any amount of mass, it becomes denser. If you compress it enough, it will become so dense that light can no longer escape it—this size...

$40.00$35.00
Tippe Top (Wood)
New
Out stock

This spinning top has a surprising behavior. When spun, it will invert itself to spin upside down until it loses momentum. This interesting gyroscopic effect is generally credited to surface friction. This small friction causes a torque which gradually rotates the...

$2.00
Solids of Constant Width (Set of 3)
New
Out stock

These solids of constant width behave like spheres. This is because, regardless of the peculiar shape, the diameter is still equal at every point. You can demonstrate this property by setting a flat object, like a book, on them and it will...

$9.95
Liquid-Filled Top
New
Out stock

We don't usually carry religious paraphernalia, but we had to make an exception for these liquid-filled glass dreidels. When spun, the colored water in the internal cavity exhibits interesting physics to keep the top spinning. Includes stand.Dimensions: 3" tall x...

$12.00
Retroreflective Glass Beads
New
Out stock

These microbeads are retroreflective beads—tiny glass spheres designed to effectively reflect light back to the light source. They are commonly applied to wet paint to create reflective surfaces and markings. They work by allowing light to pass into one side of the...

$5.95
Silicon Wafer
New
Out stock

Wafers are thin sliced semiconductors used to manufacture microelectronics and computer components. This sample is an 8" uncut silicon wafer with integrated circuits. Each wafer contains thousands of duplicate photo-lithographed circuits. Typically this wafer would have been cut up and the...

$19.95
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