1. Vacuum Cleaner Presented by: Vinit Patel Alex Valdez

2. Major Physics behind the vacuum cleaner Bernoulli Effect Bernoulli Effect Venturi Effect Venturi Effect

3. Definitions Vacuum - A space in which the pressure is significantly lower than atmospheric pressure. Vacuum - A space in which the pressure is significantly lower than atmospheric pressure. Air Pressure - Pressure exerted by the weight of air on an object in that air. Air Pressure - Pressure exerted by the weight of air on an object in that air.

4. What Happens The fan decreases the pressure inside the hose of the vacuum, so air accelerates toward the inlet. The fan decreases the pressure inside the hose of the vacuum, so air accelerates toward the inlet. It also changes the potential energy of the air to kinetic energy. It also changes the potential energy of the air to kinetic energy.

5. The Physics Bernoulli’s Principle – States that in fluid flow, an increase in velocity occurs simultaneously with decrease in pressure. Bernoulli’s Principle – States that in fluid flow, an increase in velocity occurs simultaneously with decrease in pressure.

6. The Physics Venturi Effect Venturi Effect – it’s a special case of Bernoulli’s principle, in the case of air flow through a tube or pipe with a constriction in it. The air must speed up in the restriction, reducing its pressure and producing a partial vacuum via the Bernoulli effect.

8. Larger vs. Smaller Inlet

9. Demonstrations http://home.earthlink.net/~mmc1919/ven turi.html http://home.earthlink.net/~mmc1919/ven turi.html http://home.earthlink.net/~mmc1919/ven turi.html http://home.earthlink.net/~mmc1919/ven turi.html Paper Paper Water Water

10. Sources home.earthlink.net/~mmc1919/venturi.html home.earthlink.net/~mmc1919/venturi.html howthingswork.virginia.edu/ supplements/vacuum_cleaners.pdf howthingswork.virginia.edu/ supplements/vacuum_cleaners.pdf en.wikipedia.org/wiki/Venturi_effect en.wikipedia.org/wiki/Venturi_effect en.wikipedia.org/wiki/Bernoulli's_principle en.wikipedia.org/wiki/Bernoulli's_principle