Comments on: Learn about air pressure from a leaky bottle http://www.andybrain.com/sciencelab/2007/12/02/learn-about-air-pressure-from-a-leaky-bottle/ Science Experiments for Kids, Parents and Teachers Sun, 23 May 2010 06:42:39 +0000 hourly 1 http://wordpress.org/?v=3.0.4 By: audrey and feilicia http://www.andybrain.com/sciencelab/2007/12/02/learn-about-air-pressure-from-a-leaky-bottle/comment-page-1/#comment-213 audrey and feilicia Wed, 27 May 2009 08:21:15 +0000 http://www.andybrain.com/sciencelab/2007/12/02/learn-about-air-pressure-from-a-leaky-bottle/#comment-213 thank you for your help. because of you, we can do our physics assignment. good luck! thank you for your help.
because of you, we can do our physics assignment.
good luck!

]]> By: Oisin http://www.andybrain.com/sciencelab/2007/12/02/learn-about-air-pressure-from-a-leaky-bottle/comment-page-1/#comment-144 Oisin Tue, 20 Jan 2009 17:09:38 +0000 http://www.andybrain.com/sciencelab/2007/12/02/learn-about-air-pressure-from-a-leaky-bottle/#comment-144 " The air pressure isn’t changed - the air won’t expand or contract from the very small pull of the water." This is incorrect, the air pressure inside decreases to a point where the outside air pressure pressing inwards equals the force of gravity pulling the water out. It is explained well in detail here. http://www.newton.dep.anl.gov/askasci/phy00/phy00601.htm ” The air pressure isn’t changed – the air won’t expand or contract from the very small pull of the water.”
This is incorrect, the air pressure inside decreases to a point where the outside air pressure pressing inwards equals the force of gravity pulling the water out. It is explained well in detail here.

http://www.newton.dep.anl.gov/askasci/phy00/phy00601.htm

]]> By: steven http://www.andybrain.com/sciencelab/2007/12/02/learn-about-air-pressure-from-a-leaky-bottle/comment-page-1/#comment-116 steven Wed, 22 Oct 2008 18:33:41 +0000 http://www.andybrain.com/sciencelab/2007/12/02/learn-about-air-pressure-from-a-leaky-bottle/#comment-116 hey so why cant the hole be bigger? what is the factor that makes this so? is air able to get through if the hole is too big? hey so why cant the hole be bigger? what is the factor that makes this so? is air able to get through if the hole is too big?

]]> By: Trevor Hawkes http://www.andybrain.com/sciencelab/2007/12/02/learn-about-air-pressure-from-a-leaky-bottle/comment-page-1/#comment-74 Trevor Hawkes Tue, 10 Jun 2008 18:49:58 +0000 http://www.andybrain.com/sciencelab/2007/12/02/learn-about-air-pressure-from-a-leaky-bottle/#comment-74 The text on this page states, "The air pressure is stronger than the pull of gravity. So the water stays in place." This isn't quite right. If the air pressure was stronger (assuming you mean it's stronger in the opposite direction), then the water would start moving up the bottle. A more accurate statement would be, "The air pressure produces a force that is exactly as strong as the force of gravity, allowing the water to remain in equilibrium." The text on this page states, “The air pressure is stronger than the pull of gravity. So the water stays in place.” This isn’t quite right. If the air pressure was stronger (assuming you mean it’s stronger in the opposite direction), then the water would start moving up the bottle. A more accurate statement would be, “The air pressure produces a force that is exactly as strong as the force of gravity, allowing the water to remain in equilibrium.”

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