Excess pressure in drops and bubbles
Excess pressure 2σ/r in a drop, 4σ/r in a soap bubble. Join two bubbles with a tube and watch the smaller one shrink into the larger.
About this experiment
| Subject | Physics |
|---|---|
| Class | 11 |
| Chapter | 9. Mechanical Properties of Fluids |
| NCERT section | 9.6 |
| Level | NEET 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: excess pressure · soap bubble · surface tension · Laplace
More from this chapter
- Archimedes' principle and floating bodies
- Bernoulli's principle: venturimeter
- Surface tension: capillary rise and contact angle
- Pressure on a dam wall and the centre of pressure
- Pascal's law and hydraulic lift
- Poiseuille flow: viscous flow through a tube
- Stokes' law: terminal velocity and viscosity
- Surface energy: merging and splitting water drops