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• 13:20, 14 April 2022 Physdemo talk contribs created page Jar Whistle (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Jar_Whistle.gif}} The classic blowing into a bottle to make it whistle. With the addition tubes of different lengths the tone can be changed. '''Location: ''' * Shelf D-4")