vibration

Showing 17 posts tagged vibration

Gravitational acceleration + optical illusions + how to! In this Get Set… Demonstrate, science teacher Alom Shaha shows step by step how to create Pearls of Water, a physics-defying demonstration that must look even more unbelievable in person than it does on video.

And if you want to see this in person, the instructions, equipment list, and safety notes for setting it up are here (pdf).

Want to see similar versions of this illusion? Check out artist Matt Kenyon’s Supermajor and Brusspup’s Amazing Water and Sound Experiment.

via Science Demo.

Seen at science museums, maker faires, and all over the internet, Singing Tesla Coils combine science and music in the most fantastical and memorable of ways. But how do they work? From Physics Buzz

Sound waves are vibrations of the air around us, which you can make just by clapping your hands or talking. Pitch is just the number of times the air vibrates per second. Higher frequency, higher pitch. Tesla coils are a combination of circuits that output thousands to millions of volts. That high electric field arcs up and out of the coil, filling the air with sparks and making it possible to light up fluorescent lights wirelessly. Certain types of Tesla coils, like the one used here, are putting out hundreds of sparks per second, with a rest between each spark. That’s already a lot like a sound wave. Each spark is pushing on the air and can create a sound. Change the frequency of the sparks and you get an equal frequency wave, hitting your ears like a note of music. The creators had to find a way to move seamlessly between frequencies to make the notes sound distinct, instead of just playing the whole scale.

Above, tesla coils “sing” the Inspector Gadget theme by ArcAttack, who were the first to use this technology in a live performance in late 2005. Watch more singing tesla coil videos at Know Your Meme. Related links: the tesla coil and Nikola Tesla, who invented it around 1891.

In the archives: more electricity, more instruments, and things that glow.

Thanks, @bittelmethis.

Some of our favorite instruments are made from things around the house and the sound of water in drinking glasses is a great example. Glass through Glass is a composition by Google Creative Director Alexander Chen, who recorded the video’s layers with Google Glass. Bonus: We’ve enjoyed Alexander’s work here before.

Related watching: Reggie Watts in improvised layers, more videos of glass (the material), and the magic of glass harps.

via @alexanderchen.

Science experiments + a cute and furry blue monster that we know and love = YES. Hosts Annie Colbert and Matt Silverman have clearly helped discover the formula for making an instant video favorite. From 5facts and Sesame Street:

GROVER DOES SCIENCE.

Seriously: It’s seven minutes of pure joy. 

We’ve featured a few similar experiments on the site before, but it goes without saying that everything is better with Grover. For more info on the experiments above, Mashable has step-by-step instructions, and for more Sesame Street-hosted science, technology, engineering, and math that you can do at home, visit SesameStreet.org/STEM.

via jtotheizzoe