Visualizing sound waves using a PVC pipe, gas and a lighter in some guy's garage. Now this is how physics should be taught!
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Very nice! Now it would have been much more interesting if he'd done this outdoors and hooked a 6' gas main at high pressure into the system.
Talk about shooting flames.
Much cooler than one of those computer generated graphic thingies. I need to hook one up one of these BBQ sound gizmos to my iPod.
Now that's facial hair you can trust when it comes to a physics demonstration.