Singing Tube Demonstration – Flinn Scientific Canada

Mysteriously play an organ pipe without an organ! This demonstration uses heated air to produce vibrations inside a long tube. The vibrations, in turn, produce standing sound waves with a unique tone, or timbre (ta˘mʹ br)—the same concept that produces sound from an organ pipe.

The open tubes in this demonstration act in a similar manner to the flue-type organ pipe (see Figure 5). In a flue-type organ pipe, a stream of air is directed against a sharp edge in an opening of the pipe. The sharp edge creates turbulent, complicated swirls of air which set up vibrations in the air column.

Click here to download the complete activity





Musical Straw – Steve Spangler

So, you’re waiting for your dinner to arrive and you’re bored out of your mind. There’s nothing to read… the conversation is slim to none… and you’ve already counted all of the sugar packets. Hmmm? There’s a straw… and straws are interesting. Is there anything you can do with a straw to “be amazing?” Keep reading – in a matter of minutes you’ll have the entire restaurant upset by your science antics.

Click here to the full experiment at Steve’s website