+2 votes
in Fluid Mechanics by (118k points)
Determine the minimum size of glass tube that can be used to measure water level if the capillary rise in the tube is restricted to 5mm. Consider surface tension of water in contact with air as 0.073 N/m

(a) 5.95mm

(b) 11.9mm

(c) 2.97mm

(d) 4.46mm

This question was addressed to me during an interview.

Asked question is from Surface Tension, Capillarity, Vapour Pressure and Cavitation topic in section Properties of Fluids of Fluid Mechanics

1 Answer

+2 votes
by (362k points)
selected by
 
Best answer
Correct choice is (a) 5.95mm

Easy explanation: d=4*cosθ*σ/ρ*g*h

                       =4*1*0.073/1000*9.81*0.005

                       =5.95mm.

Related questions

We welcome you to Carrieradda QnA with open heart. Our small community of enthusiastic learners are very helpful and supportive. Here on this platform you can ask questions and receive answers from other members of the community. We also monitor posted questions and answers periodically to maintain the quality and integrity of the platform. Hope you will join our beautiful community
...