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Bubble Blower

Blow bubbles, split drops and stick plates together. Find the pressure and the energy.

Physics · Class 11 · Surface tension, drops and bubbles · 10 simulations. For JEE, NEET and your boards.

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What you'll learn

  1. Hold the slider: A soap film pulls with 2Sl
  2. Split the drop: Surface energy: E = S × the new area
  3. Pressure in a drop: Pressure inside a drop: ΔP = 2S/r
  4. Soap bubble pressure: A soap bubble has two surfaces: ΔP = 4S/r
  5. Blow it bigger: Work to blow a bubble = S × the new film area
  6. Bubble deep in water: A bubble under water: depth plus surface
  7. Two bubbles stuck: The shared film: 1/R = 1/r₁ − 1/r₂
  8. Plates stuck with water: Wet plates stick: F = 2SA/d
  9. Pump the chamber: A bubble in a pumped chamber: (P + 4S/r) r³ stays the same
  10. Pump it to nothing: Pump to a vacuum: only the film holds the air