05-08-2020, 01:10 PM 
	
	
	
		I had pretty good result by hitting the open end of 250mL graduated cylinder with my open hand ! Less than 5% of error.
   
Here is the video :
https://www.youtube.com/watch?v=3CcmVsOY...e=youtu.be
	
	
	
	
Here is the video :
https://www.youtube.com/watch?v=3CcmVsOY...e=youtu.be

