take a piece of garden hose. hold up both ends and let the rest lie on the ground, as it will.
now fill it with water, leaving the water a few inches off each end. the pressure pushing on the water at each end of the hose is the same = atmospheric. now gently blow on one end (just this once...(:-D)). you will observe the water column moves away from your mouth, and up the other end. what is the pressure at the open end ? atmospheric. what is the pressure at the mouth end ? atmospheric + additional pressure you generated. the open end is not sucking the water up. rather the mouth end is pushing the water out the other end. this is the way pressures work. the term vacuum is simply a synonym for 'differential pressure' vacuum per se does not exist. it's just a lower relative pressure. hope this helps. cheers, dick. Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
