ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions. ***************************************************************************** I'd be interested in this as well. Other Bernoulli phenomena I've seen done well: A ping pong ball captured in a tube - blow air across the top of the tube, the ball rises. I believe Arizona Science Center did this one along with the blowing air between two balls to cause them to come together. Blowing horizontally across the top of a sheet with one end of an air hose lifts the rest of the sheet. Put a ping pong ball in the opening of a funnel, blow air through it and turn it upside down. The ball remains floating in the funnel. One museum had a decent example of this: they had air blowing down, you put a square piece of plastic (or foam - can't remember for sure) in front of the pipe that blew down. The air actually kept the square piece floating - pinned to the top - quite cool, but I think most people probably didn't follow the instructions and put the square piece right against the downward air outlet (it doesn't work if you don't do this). I may have seen this one in Durham Museum of life and science. Also for examples of Venturi principles, and other fluid flow phenomena you can blow tube through a pipe with multiple (2 or 3 or actually more if you insist) openings and drop foam balls in one opening. Then experiment with capping the different openings. Airplay (by Montshire, marketed by ASTC) has a good version of this. As a side note, does anyone know where to get some good foam balls or other shapes for demonstrating these phenomena? I love the idea of challenging the misconception of the shape of the blower affecting which shape stayed aloft... -William William Katzman "The important thing is to never stop questioning." -A. Einstein Director of Exhibits "Are you sure about that Al?" -His wife. Catawba Science Center ph: (828) 322-8169 x307 fax:(828) 322-1585 [log in to unmask] -----Original Message----- From: Andrea Stark [SMTP:[log in to unmask]] Sent: Monday, August 30, 2004 6:02 PM Subject: Bernouilli exhibits ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions. ************************************************************************ ***** We'd like to make changes to our Bernouilli exhibit, which now consists essentially of several small blowers that can be moved around to keep ping pong balls in the air and/or "make a basket" with them. Does anyone have examples of more interesting exhibits that demonstrate Bernouilli's principle or otherwise deal with air flow and could capture the attention of older visitors, yet be operable by younger visitors to our children's museum? Andrea Stark Executive Director Maine Discovery Museum 74 Main St., Bangor, ME 04401 207-262-7200; FAX: 207-947-6281 www.mainediscoverymuseum.org *********************************************************************** More information about the Informal Science Education Network and the Association of Science-Technology Centers may be found at http://www.astc.org. To remove your e-mail address from the ISEN-ASTC-L list, send the message SIGNOFF ISEN-ASTC-L in the BODY of a message to [log in to unmask] *********************************************************************** More information about the Informal Science Education Network and the Association of Science-Technology Centers may be found at http://www.astc.org. To remove your e-mail address from the ISEN-ASTC-L list, send the message SIGNOFF ISEN-ASTC-L in the BODY of a message to [log in to unmask]