Surface tension: capillary rise and contact angle
Dip tubes of different radius in water, alcohol, glycerine or mercury: height h = 2σcosθ/(ρgr), contact angle and meniscus shape, and why mercury is depressed.
About this experiment
| Subject | Physics |
|---|---|
| Class | 11 |
| Chapter | 9. Mechanical Properties of Fluids |
| NCERT section | 9.6 |
| Level | NCERT level |
| Time | about 12 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: surface tension · capillary rise · contact angle · meniscus · Jurin's law
More from this chapter
- Archimedes' principle and floating bodies
- Bernoulli's principle: venturimeter
- Pressure on a dam wall and the centre of pressure
- Pascal's law and hydraulic lift
- Poiseuille flow: viscous flow through a tube
- Excess pressure in drops and bubbles
- Stokes' law: terminal velocity and viscosity
- Surface energy: merging and splitting water drops