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I guess you still werent quite understanding what I am trying to say. I am using the term "negative pressure" as any pressure below standard atmospheric pressure...i.e. anything below 14.7 psi at sea level. I still just personally disagree with you. Just to make sure, I called my old instructor and asked him about it. and he said TECHNICALLY both explanations are correct, it just depends on how you look at it. after we talked he took the test (i sent him the link) and he got a 100% (go figure) but he DID agree that in the scientific word, either answer would be correct, so really you and I are BOTH right! Thanx for the interesting conversation.
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"It is not that I have failed, but that I have found 10,000 ways that it DOESN'T work!" --Thomas Edison
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