Does 30 psi of Water = 30 psi of Air?

[SCSIfreek]

Answer the Question smart people!!!!!!

--Scsi

 

[minus1972]

no...because water is more dense then air(?)

 

[iamwiz82]

pressure wise, yes. 1 lb of feathers = 1 lb of lead


EDIT: This was my f'ing lifer post.

 

[Zenmervolt]

Originally posted by: iamwiz82
pressure wise, yes. 1 lb of feathers = 1 lb of lead


EDIT: This was my f'ing lifer post.

Good thing it was such an important and memorable post.

ZV

 

[KK]

I thought water itself could not be pressurized the same way air is. That is packing more water in the same area, like you can do with air.

KK

 

[Zugzwang152]

Originally posted by: minus1972
no...because water is more dense then air(?)

same pressure yes, it it takes different amounts of each to equal the same pressure (water is denser than air).

 

[slikmunks]

yeah it is... but if you ask if the volume on a container of a certain amount of water at 30psi is the same size as that certain amount of air at 30 psi, no, because water is denser than air already... and water is in liquid form, making it MUCH MUCH denser

 

[Beattie]

Originally posted by: minus1972
no...because water is more dense then air(?)

PSI is a unit of pressure, not density.

therefore 30 psi of water == 30 psi of anything == 30 psi of air. of course pressure is subject to things like volume and tempreture

PV=nRT

 

[minus1972]

meh, a winnah is not me then.

 

[Zenmervolt]

Originally posted by: KK
I thought water itself could not be pressurized the same way air is. That is packing more water in the same area, like you can do with air.

KK

Water cannot be compressed, correct. However, someting in the water can be compressed by the weight of the water.

ZV

 

[iamwiz82]

Originally posted by: Zenmervolt

Originally posted by: iamwiz82
pressure wise, yes. 1 lb of feathers = 1 lb of lead


EDIT: This was my f'ing lifer post.

Good thing it was such an important and memorable post.

ZV

story of my life

 

[slikmunks]

Originally posted by: Zenmervolt

Originally posted by: KK
I thought water itself could not be pressurized the same way air is. That is packing more water in the same area, like you can do with air.

KK

Water cannot be compressed, correct. However, someting in the water can be compressed by the weight of the water.

ZV

sure it can, it just takes a LOT of pressure to compress water a little bit...

 

[slikmunks]

however, for most purposes, there's no point to compressing water, cuz it takes way too much pressure to yield a small change in volume as a result of the pressure

 

[Zenmervolt]

Originally posted by: slikmunks

Originally posted by: Zenmervolt

Originally posted by: KK
I thought water itself could not be pressurized the same way air is. That is packing more water in the same area, like you can do with air.

KK

Water cannot be compressed, correct. However, someting in the water can be compressed by the weight of the water.

ZV

sure it can, it just takes a LOT of pressure to compress water a little bit...

Well, for all practical purposes water cannot be compressed. (I'm just upset that for once I'm not the one posting with the, "well, technically..." response.)

ZV

 

[VBboy]

1 POUND per SQUARE INCH of anything is the same.

 

[Woodchuck2000]

Originally posted by: VBboy
1 POUND per SQUARE INCH of anything is the same.

Well exactly! Where did all the the talk of compressing things come from?
It's like saying "Is a metre of steel the same as a metre of rope"

 

[Siddhartha]

A pound is a pound.

 

[majewski9]

yes

 

[Moonbeam]

It doesn't take different amounts of air or water to create the same pressure if you are talking about pressure created by gravity. It takes exactly the same amount. The volume is different. You could, however, because air is a gas and compressable, create 30 Lbs of pressure with a tiny amount of air by pumping it inot a configned space. Air can also be liquified with enough pressure.