lets say if i have a test tube (diameter 3cm and height 30cm)close with a rubber. in the test tube there 100ml of water= around 10 cm height. if air was put into the test tube with flow rate around 20mL/min, and after a few sec, the rubber was push out. in general i understand that the pressure inside the test tube is higher than atmospheric pressure. but i cant find any mathematical solution that relate flow rate and pressure to proof that the pressure inside the test tube is higher than outside. can anyone explain it to me
curiosity about pressure difference
15 February 2011
#1
curiosity about pressure difference