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OfflineRogerRabbitM
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Re: Dry conditions--Miracle Gro perlite the culprit? [Re: SomeGuy]
    #12560894 - 05/14/10 09:25 AM (14 years, 8 months ago)

Quote:

.I looked it up. Pressure goes UP one psi for every 10 degrees farenhiet. Put a ballon in the freezer and watch it deflate. Cold air is more dense and therefor has LOWER pressure.




Don't confuse what happens in an enclosed vessel with what happens in free air, such as a shotgun terrarium full of holes.  The highest pressure on the planet occurs in the arctic areas during winter, and the lowest pressure occurs in the tropics during summer.  You're arguing physics without a basic understanding of processes involved.  Sorry to be harsh.  Keep reading and studying though.  It's how we all learn.  Air expands when heated.  That means the molecules are farther apart, resulting in lower pressure.  We can artificially create pressure by heating air in a vessel such as a hot air balloon, but that doesn't simulate what happens in free air.
RR


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OfflineSomeGuy
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Re: Dry conditions--Miracle Gro perlite the culprit? [Re: RogerRabbit]
    #12561435 - 05/14/10 11:39 AM (14 years, 8 months ago)

don't worry about being harsh, say anything. A great debate! So....It seems like when you put a ballon in the freezer. It deflates because the the molicules crowd together making the volume drop, relatively speaking. Being that air pressure is more or less consistant(14psi@sea level)it always pushes the same amount, so when the ballon shrunk, is it not because the pressure dropped inside because the drop in temp. where as outside the balloon the pressure remained constant? I always thought water evaporated because when it vaporizes the 2 light hydrogen molucules carryed the single o because its lighter than 02,co2,co and anything else in air. And when it rises it loses enrgy(heat)until it condensesand falls. If that was the case, would not water vapor rise, while at the same time co2 falls, creating the exact circulation that you speak of inside the sg? I'm just trying to understand the science. Also is the air on Everest so cold because of the low pressure, or is the pressure so low because it is cold. You see how I'm confused, It seems counter-intuative. Pressure is a force that increases with heat. Like a pressure cooker. It's MASS that decreaces. Thats what I learned in school, but hundreds of years ago they tought that the earth was the center of the universe

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Invisibleteknix
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Re: Dry conditions--Miracle Gro perlite the culprit? [Re: RogerRabbit]
    #12561468 - 05/14/10 11:49 AM (14 years, 8 months ago)

Quote:

RogerRabbit said:
Quote:

.I looked it up. Pressure goes UP one psi for every 10 degrees farenhiet. Put a ballon in the freezer and watch it deflate. Cold air is more dense and therefor has LOWER pressure.




Don't confuse what happens in an enclosed vessel with what happens in free air, such as a shotgun terrarium full of holes.  The highest pressure on the planet occurs in the arctic areas during winter, and the lowest pressure occurs in the tropics during summer.  You're arguing physics without a basic understanding of processes involved.  Sorry to be harsh.  Keep reading and studying though.  It's how we all learn.  Air expands when heated.  That means the molecules are farther apart, resulting in lower pressure.  We can artificially create pressure by heating air in a vessel such as a hot air balloon, but that doesn't simulate what happens in free air.
RR




No it doesnt, it occures deep in the ocean.

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Offlinetajmahal420
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Registered: 05/23/09
Posts: 533
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Re: Dry conditions--Miracle Gro perlite the culprit? [Re: teknix]
    #12561505 - 05/14/10 11:57 AM (14 years, 8 months ago)

Quote:

teknix said:
Quote:

RogerRabbit said:
Quote:

.I looked it up. Pressure goes UP one psi for every 10 degrees farenhiet. Put a ballon in the freezer and watch it deflate. Cold air is more dense and therefor has LOWER pressure.




Don't confuse what happens in an enclosed vessel with what happens in free air, such as a shotgun terrarium full of holes.  The highest pressure on the planet occurs in the arctic areas during winter, and the lowest pressure occurs in the tropics during summer.  You're arguing physics without a basic understanding of processes involved.  Sorry to be harsh.  Keep reading and studying though.  It's how we all learn.  Air expands when heated.  That means the molecules are farther apart, resulting in lower pressure.  We can artificially create pressure by heating air in a vessel such as a hot air balloon, but that doesn't simulate what happens in free air.
RR




No it doesnt, it occures deep in the ocean.




Why are you here? Ahh, my first ignored member.

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