The Bernoulli Principle:
The pressure in a "moving stream" of fluid is LESS than that of the surrounding fluid. Recall the demonstrations:
- blowing between the 2 soda cans
- the beach ball suspended by the air from the shop vac
- imagine putting your thumb over the nozzle from a garden hose
The last example relates to the "equation of continuity" -
A1 v1 = A2 v2
Meaning: As the area (of the tube) gets smaller, the speed of the fluid gets greater.
Videos for the carburetor:
http://www.youtube.com/watch?v=4MnOgR4_jaE
http://www.fz1-forum.com/forum/gen-i-garage-tech-help/13659-how-carburetor-works-short-animation.html
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