Which of the following do spray bottles used as window or household cleaners or perfume sprayers work on?
- ACapillary action
- BBernoulli's principle
- CPascal's Law
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (b) Bernoulli's principle
Explanation
In a spray bottle, the pump sends a fast stream of air across the top of a thin tube dipping into the liquid. By Bernoulli's principle, fast-moving air has lower pressure.
The higher pressure on the liquid in the bottle pushes it up the tube, and the air stream breaks it into a fine spray.