A liquid dropper works by creating a vacuum that draws liquid into the tube. Here's a breakdown:
- Squeezing the Bulb: When you squeeze the rubber bulb at the top of the dropper, you force air out of it. According to the reference, "The harder we press the larger the amount of air that is pushed out."
- Creating a Vacuum: Releasing the bulb creates a vacuum (a space with lower air pressure) inside the dropper. The reference states, "And the greater the vacuum that is created as a result more..."
- Drawing the Liquid: The higher air pressure outside the dropper pushes the liquid into the dropper's tube to equalize the pressure. The reference concludes, "Water is pushed in." The amount of liquid drawn depends on the strength of the vacuum created.
In essence, a liquid dropper uses pressure differences to suck up and dispense liquids.
