WebPlace rubber stoppers over each flask and allow flasks to sit for approximately one hour. After one hour, replace the rubber stopper with a second stopper containing a funnel and rubber tubing attached to a glass tube. Place the glass tube into a test tube about ½ full with water. Add several drops of phenol red solution to the test tube. WebIn an experiment, a rubber stopper is attached to one end of a string that is passed through a plastic tube before weights are attached to the other end. The stopper is whirled in a horizontal circular path at constant speed. Radius of path Circular path Rubber This …
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WebApr 4, 2024 · What is a rubber stopper used for in a lab? Rubber stoppers are ideal for plugging joints or holes in laboratory glassware and creating a liquid-tight seal. Rubber … Webstopper. Tie the rubber stopper to one end of the string. Thread the other end of the string through the tube. Tie the free end of the string to the 100 gram mass. Your gadget should look like the diagram shown below: Hold the tube with your left hand and grasp the 100 gram mass in your right hand. Gently twirl the tube so that the stopper ... http://dev.physicslab.org/document.aspx?doctype=5&filename=compilations_nyregents_june2010_part3.xml canon ink hk