Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538
Demonstrations are cataloged according to PIRA Bibliography
PLEASE REQUEST DEMOS WELL IN ADVANCE
Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.
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You have selected the following Demos:
Purpose:To illustrate Newton's third law.
Procedure:Place water in rocket with funnel and fill to indicated level. Slide rocket nozzle into pump and secure. Pump the rocket not more than 10 times as the rocket has been flown by very poorly trained pilots in the past and has suffered many hard wall injuries and may explode if too much pressure is applied. Hold rocket and pump horizontally and release by sliding back catch. Students usually get wet during this demo so it is best done at the end of class.
An alternative more powerful version of the demo is available (see 2nd picture). In fact one can run this version even without water. Place the 2L rocket onto the nozzle and secure with the U-shaped pin. Connect the hose either to the compressed air outlet or a hand pump (the nozzle is available). Pumped to a desired pressure and release the pin by pulling on the attached string.
Hints:For alternative version replace the Teflon tape wrap on the nozzle if the air leak during pumping is too strong.