THE BEST Experiments

Making a Mirrored Room

Making a Mirrored Room

Now that The Action Lab has painted a room in the blackest and glowing-ist paints, he’s renovated his temporary space again. This time, he covered its walls, ceiling, and floor entirely with mirrors. Despite the reflections seeming infinite, he explains how they eventually drop off.

Glue Traps vs. Humans

Glue Traps vs. Humans

Glue traps are used to catch bugs and rodents. But if you had enough of them, could you use them to snare a full-grown human? The guys at The King of Random put that idea to the test, culminating with an experiment where they tried to stick people to a wall.

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Pitch Black Room

Pitch Black Room

Musou Black is said the be the blackest paint you can buy at the moment, absorbing almost all visible light. After painting some small objects with the super-dark stuff, The Action Lab created a room just so he could paint it entirely black. The Rolling Stones would be proud.

Burning Matches Underwater

Burning Matches Underwater

The Q shows off a goopy compound they made from wood glue, nail varnish, and match sulfur that lets homemade matches burn even when fully submerged in water. This is definitely one you shouldn’t try at home, given the risks of both fire and the unknown consequences of breathing the vapors the chemicals produce.

Longest Simple Electric Train

Longest Simple Electric Train

A while back, YouTuber Mr. Michal showed off a simple railway he built from coils of wire, batteries, and magnets. Now, he’s back with a much longer and more complex train set that still operates on the same electromagnetic principles. This time, the track measures in at over 20 meters long, or about 66 feet.

High Voltage Levitation

High Voltage Levitation

After watching a video from Plasma Channel which explored the possibilities of levitating objects with electrostatic energy, Mehdi from ElectroBOOM decided to see if he could replicate the experiment. Naturally, it’s not an ElectroBOOM video without delivering a jolt or ten to its host.

Fun with Baking Soda Rockets

Fun with Baking Soda Rockets

Combining vinegar and baking soda inside a soda bottle creates an explosive amount of pressure – enough to launch the bottle sky high. Nick Uhas wanted to see not only how far he could make a soda bottle fly horizontally using this method, but also what would happen if he super-sized the experiment using a 5-gallon water jug.

Trying to to Catch a 1000 MPH Baseball

Trying to to Catch a 1000 MPH Baseball

After building a supersonic baseball cannon, Devin from SmarterEveryDay and his friends turned their attention to the business end of the cannon. The goal of their latest experiments? To see how many leather baseball gloves it takes to stop a baseball moving at 1.3 times the speed of sound.

Magnetic Accelerators

Magnetic Accelerators

The opposing forces of magnets can produce a tremendous amount of energy, and can even be used to levitate and move trains along a track. In this clip from Magnetic Games, he demonstrates these physics at work, though on a smaller scale using a bunch off-the-shelf neodymium magnets he got from Supermagnete.

How Strong Is Paper?

How Strong Is Paper?

The guys at the Hydraulic Press Channel have been causing paper to explode under pressure for quite some time now. In this clip they attempt to measure just how much force a stack of paper can endure before failing spectacularly.

Bursting Droplets

Bursting Droplets

Physics can be so much fun. The Lutetium Project shows how a dropper filled with a mixture of water, alcohol, and dye dripped into an oil bath can create beautiful and unexpected patterns thanks to their differences in surface tension. For more droplet fun, check this out.

Does Helium Affect Wind Instruments?

Does Helium Affect Wind Instruments?

We all know that breathing helium makes you sound like Mickey Mouse. But does that pitch change affect the air you blow into a saxophone or a bagpipe? The guys from The King of the Random conducted a few experiments to test out the impact of helium and sulfur hexafluoride on the frequencies wind instruments produce.

World’s Largest Dry Ice Bubble

World’s Largest Dry Ice Bubble

While we’re not sure that Liam Thompson really set any kind of world record, we’re still mighty impressed with the gigantic soap bubble he and his sister managed to make using dish soap, dry ice, an inflatable kiddie pool, and a piece of string.

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The Most Flammable Dust

The Most Flammable Dust

You wouldn’t think that something as innocuous as corn starch could cause a massive fireball, but you’d be wrong. The Beyond the Press channel conducted a series of experiments to show just how flammable various kinds of dust and powder can be when exposed to a flame. They didn’t try non-dairy creamer though.

Super Slow-mo Talking, Coughing, and Sneezing

Super Slow-mo Talking, Coughing, and Sneezing

If you still have any doubts about the benefits of wearing a mask to prevent the spread of COVID-19 and other infectious diseases, this video from The Slow-Mo Guys and special guest Dr. Anthony Fauci should set you straight. The number of droplets that go flying when speaking without a mask on is particularly illuminating.

Ice Bodies

Ice Bodies

Artist and museum exhibit designer Shawn Lani has built a machine that circulates dry ice into a shallow tub of water, resulting in captivating cloud-like motion as the frozen carbon dioxide melts. His Icy Bodies exhibit can be found in a number of science museums around the world.

The Levitating Liquid Pendulum

The Levitating Liquid Pendulum

Scientist Steve Mould shows us how, with the right conditions, you can make a viscous liquid like oil levitate by vigorously shaking it. The rapid vibrations end up stabilizing the equilibrium of the fluid as it rises and falls within a vessel.

What’s the Strongest Tree?

What’s the Strongest Tree?

While it’s far from a comprehensive test, and they only tested for compressive strength, it’s still fun to see what happens to different types of tree trunks when they’re crushed in a powerful hydraulic press. Which kind of wood do you think will be the most durable?

Blowing Underwater Fire Rings

Blowing Underwater Fire Rings

The Backyard Scientist has a penchant for dangerous, yet impressive experiments. In this clip, he takes to his swimming pool with a contraption that’s designed to blow perfect bubble rings, but instead of just filling them with oxygen, he introduces some propane, so when hit with an electric charge, they explode.

Exploding Devil’s Toothpaste

Exploding Devil’s Toothpaste

There are numerous articles out there on how to make a messy concoction called elephant toothpaste. Engineer Mark Rober has even filled a swimming pool with the stuff. Now, he’s made something far more reactive and explosive, dubbed “devil’s toothpaste.” He then supersized the experiment for a very special fan.

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Slow-Mo in Reverse

Slow-Mo in Reverse

Inspired by the time-bending antics of Christopher Nolan movies like Tenet, Gav of The Slow Mo Guys shows up in a room where a bunch of things have already been destroyed, and attempts to clean up the mess by doing everything in reverse. That elephant toothpaste stuff never gets old.

Filling Stretch Armstrong

Filling Stretch Armstrong

The Stretch Armstrong toy was engineered to be stretched as much as possible, though we’re pretty sure they never intended for it to do this. Watch as the guys from The King of Random cut off his head, then pump him with 25 gallons of water. On the second go-round, they removed the sticky goo inside to improve their results.

World’s Fastest Baseball Pitch

World’s Fastest Baseball Pitch

An excellent MLB pitcher can throw a 100 mph fastball. But what would it take to pitch a ball faster than the speed of sound? Destin from Smarter Every Day set out to answer that question, and enlisted his engineering pals to build a high-pressure cannon that can launch a ball so fast that it explodes on contact.

Launching a Rocket Underwater

Launching a Rocket Underwater

Warped Perception enjoys seeing how things look in slow-motion. He recently got the idea to launch a model rocket from inside of an aquarium, letting us see how it behaves both in and out of the water. We love the way its exhaust plume changes as it breaks the surface of the water.

Sharks vs. Blood

Sharks vs. Blood

After an earlier experiment with trying to get sharks to swarm into human blood, Engineer Mark Rober teamed up with Discovery’s Shark Week to build a single-person shark cage, and headed into the waters of the Bahamas to see if he could get a feeding frenzy going around him using fish blood instead.

What Was Starlite?.. and How to Make It

What Was Starlite?.. and How to Make It

Back in the 1980s, hairdresser and inventor Maurice Ward came up with a substance that was apparently incredibly resistant to heat and fire. NightHawkinLight explores the history of the material known as Starlite, what happened to it, and then makes his own version of the compound.

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