{"product_id":"united-scientific®-free-fall-tube","title":"United Scientific® Free Fall Tube","description":"An economical version of a classic device! This apparatus demonstrates that all objects experience the same gravitational acceleration and fall at the same speed in a vacuum, but in air the air resistance slows down some objects more than others. Features a disc and a feather in a tough, clear, plastic tube, 90cm long and 4.5cm diameter, with rubber end caps and hose cock for connection to any standard vacuum pump (not included). Includes activity guide.","brand":"United Scientific Supplies","offers":[{"title":"Default Title","offer_id":49962365714709,"sku":"USSFFT001","price":75.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/FFT001_20Free_20Fall_20Apparatus.jpg?v=1781073590","url":"https:\/\/unitedsupplycorp.com\/products\/united-scientific%c2%ae-free-fall-tube","provider":"United Supply Corp.","version":"1.0","type":"link"}