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http://www.helium.com/items/1882339-doomsday-how-bp-gulf-disaster-may-have-triggered-a-world-killing-event
--
Tim Cook
http://empyrean.freesitespace.net
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"The subterranean methane is pressurized at 100,000 pounds psi.
According to Matt Simmons, an oil industry expert, the methane pressure
at the wellhead has now skyrocketed to a terrifying 40,000 pounds psi."
Who the **** says "pounds psi"?
First, basic grammer dictates that it's PSI (if not P.S.I.). Second, the
P *stands for* pounds, idiot! :-P
Now don't get me wrong, but this whole document seems very heavy on
scary words like "gaping wound" and "deadly toxic chemicals", and a
little light on facts. So I'm not too concerned just yet...
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Invisible wrote:
> Who the **** says "pounds psi"?
Someone talking to an audience that doesn't know what "psi" means?
What's the metric unit of pressure like this, out of curiousity?
--
Darren New, San Diego CA, USA (PST)
C# - a language whose greatest drawback
is that its best implementation comes
from a company that doesn't hate Microsoft.
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On 08/07/2010 5:07 PM, Darren New wrote:
> What's the metric unit of pressure like this, out of curiousity?
>
1 psi equals 6,895 Pascals or N/m^2
--
Best Regards,
Stephen
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Invisible <voi### [at] dev null> wrote:
> "The subterranean methane is pressurized at 100,000 pounds psi.
> According to Matt Simmons, an oil industry expert, the methane pressure
> at the wellhead has now skyrocketed to a terrifying 40,000 pounds psi."
> Who the **** says "pounds psi"?
"Pounds Per Square Inch." Isn't it rather obvious?
--
- Warp
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>> Who the **** says "pounds psi"?
>
> Someone talking to an audience that doesn't know what "psi" means?
Then why not just write "pounds per square inch"? Or just "PSI"? If you
don't know what it means, adding "pounds" doesn't really help.
> What's the metric unit of pressure like this, out of curiousity?
x Pascals = x Newtons/square meter.
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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Stephen <mca### [at] aoldotcom> wrote:
> On 08/07/2010 5:07 PM, Darren New wrote:
> > What's the metric unit of pressure like this, out of curiousity?
> >
> 1 psi equals 6,895 Pascals or N/m^2
Isn't it confusing that "pound" is both a unit of mass and of force?
--
- Warp
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On 08/07/2010 6:28 PM, Warp wrote:
> Stephen<mca### [at] aoldotcom> wrote:
>> On 08/07/2010 5:07 PM, Darren New wrote:
>>> What's the metric unit of pressure like this, out of curiousity?
>>>
>
>> 1 psi equals 6,895 Pascals or N/m^2
>
> Isn't it confusing that "pound" is both a unit of mass and of force?
>
Not to native English speakers.
If you want to differentiate between them then you will say pound-force
(speakers of technical English only).
--
Best Regards,
Stephen
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Warp wrote:
> Stephen <mca### [at] aoldotcom> wrote:
>> On 08/07/2010 5:07 PM, Darren New wrote:
>>> What's the metric unit of pressure like this, out of curiousity?
>>>
>
>> 1 psi equals 6,895 Pascals or N/m^2
>
> Isn't it confusing that "pound" is both a unit of mass and of force?
I believe that "stone" is actually the unit of weight. But given that the
word was likely created before people understood there's a difference, and
given that "pounds" is always the same force in Earth's gravity field, and
given that it doesn't really get used in the scientific field where you wind
up in situations where mass and force are actually important to distinguish,
... no, I don't think so.
So when the instruction book for your car tells you how much pressure to put
in your tires, do they really say "put 206,000 newtons of pressure in your
tires"?
--
Darren New, San Diego CA, USA (PST)
C# - a language whose greatest drawback
is that its best implementation comes
from a company that doesn't hate Microsoft.
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On 08/07/2010 6:34 PM, Darren New wrote:
> Warp wrote:
>> Stephen <mca### [at] aoldotcom> wrote:
>>> On 08/07/2010 5:07 PM, Darren New wrote:
>>>> What's the metric unit of pressure like this, out of curiousity?
>>>>
>>
>>> 1 psi equals 6,895 Pascals or N/m^2
>>
>> Isn't it confusing that "pound" is both a unit of mass and of force?
>
> I believe that "stone" is actually the unit of weight. But given that
> the word was likely created before people understood there's a
> difference, and given that "pounds" is always the same force in Earth's
> gravity field, and given that it doesn't really get used in the
> scientific field where you wind up in situations where mass and force
> are actually important to distinguish, .... no, I don't think so.
>
Just out of interest (possibly) when I was at school we were taught
about the SI units but did our hard sums in pounds-force, foot pounds
and even BTU’s. But as Andrew said, I’m an old guy with grey hair.
> So when the instruction book for your car tells you how much pressure to
> put in your tires, do they really say "put 206,000 newtons of pressure
> in your tires"?
>
Measured in Bars I believe.
--
Best Regards,
Stephen
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Darren New <dne### [at] sanrrcom> wrote:
> So when the instruction book for your car tells you how much pressure to put
> in your tires, do they really say "put 206,000 newtons of pressure in your
> tires"?
I think you are confusing force (newtons) with pressure (pascals), which
is force per unit area.
Things like air pressure are measured in pascals or, more traditionally,
in bars (1 bar = 100 kilopascals), and sometimes (even though rarely
nowadays) in atmospheres (1 atm = 101325 Pa).
--
- Warp
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Warp wrote:
> I think you are confusing force (newtons) with pressure (pascals), which
> is force per unit area.
Yes.
> Things like air pressure are measured in pascals or, more traditionally,
> in bars (1 bar = 100 kilopascals), and sometimes (even though rarely
> nowadays) in atmospheres (1 atm = 101325 Pa).
Ah, thank you. I never really learned what a "bar" was. So one bar is
approximately one atmosphere? That sounds about useful.
--
Darren New, San Diego CA, USA (PST)
C# - a language whose greatest drawback
is that its best implementation comes
from a company that doesn't hate Microsoft.
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> Ah, thank you. I never really learned what a "bar" was. So one bar is
> approximately one atmosphere? That sounds about useful.
See the other thread about Andrew's heating system, it's also useful that 1
bar ~= 10 metres of water for quick estimations.
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On 09/07/2010 8:11 AM, scott wrote:
>> Ah, thank you. I never really learned what a "bar" was. So one bar is
>> approximately one atmosphere? That sounds about useful.
>
> See the other thread about Andrew's heating system, it's also useful
> that 1 bar ~= 10 metres of water for quick estimations.
>
>
Or 1 bar ~= 34 feet of water. (In real money) ;-)
--
Best Regards,
Stephen
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Stephen wrote:
> Or 1 bar ~= 34 feet of water. (In real money) ;-)
As opposed to what? The square root of -1 money? :-P
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On 09/07/2010 8:51 AM, Invisible wrote:
> Stephen wrote:
>
>> Or 1 bar ~= 34 feet of water. (In real money) ;-)
>
> As opposed to what? The square root of -1 money? :-P
As opposed to new money. £sd -> £p.
--
Best Regards,
Stephen
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>>> Or 1 bar ~= 34 feet of water. (In real money) ;-)
>>
>> As opposed to what? The square root of -1 money? :-P
>
> As opposed to new money. £sd -> £p.
There are 10^0 + 1 kinds of people...
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On 09/07/2010 10:25 AM, Invisible wrote:
>>>> Or 1 bar ~= 34 feet of water. (In real money) ;-)
>>>
>>> As opposed to what? The square root of -1 money? :-P
>>
>> As opposed to new money. £sd -> £p.
>
> There are 10^0 + 1 kinds of people...
Yeah, thee and me. ;-)
--
Best Regards,
Stephen
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>>>>> Or 1 bar ~= 34 feet of water. (In real money) ;-)
>>>>
>>>> As opposed to what? The square root of -1 money? :-P
>>>
>>> As opposed to new money. £sd -> £p.
>>
>> There are 10^0 + 1 kinds of people...
>
> Yeah, thee and me. ;-)
>
Aye.
(Or should that be "i"?)
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scott <sco### [at] scottcom> wrote:
> it's also useful that 1 bar ~= 10 metres of water for quick estimations.
I didn't quite understand that.
--
- Warp
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>> it's also useful that 1 bar ~= 10 metres of water for quick estimations.
>
> I didn't quite understand that.
It's useful for quick estimations involving water (one of the most common
pressurised fluids you come across) because it's a multiple of 10.
eg a water tank 4 metres above the tap, pressure at the tap is 0.4 bar.
or, 2 bar coming into your house, what's the pressure at the valve in your
roof 6 metres up? 1.4 bar
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scott <sco### [at] scottcom> wrote:
> >> it's also useful that 1 bar ~= 10 metres of water for quick estimations.
> >
> > I didn't quite understand that.
> It's useful for quick estimations involving water (one of the most common
> pressurised fluids you come across) because it's a multiple of 10.
> eg a water tank 4 metres above the tap, pressure at the tap is 0.4 bar.
> or, 2 bar coming into your house, what's the pressure at the valve in your
> roof 6 metres up? 1.4 bar
You mean that when you dive, each 10 meters of depth adds approximately
1 bar of pressure?
--
- Warp
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> You mean that when you dive, each 10 meters of depth adds approximately
> 1 bar of pressure?
Yes, that too.
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scott wrote:
> See the other thread about Andrew's heating system, it's also useful
> that 1 bar ~= 10 metres of water for quick estimations.
Yes, that's the only place I've encountered the term.
IIRC, a "bar" was picked as a "bar of mercury", i.e., one atmosphere? Except
then normalized to nearby SI units?
--
Darren New, San Diego CA, USA (PST)
C# - a language whose greatest drawback
is that its best implementation comes
from a company that doesn't hate Microsoft.
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Warp wrote:
> Stephen <mca### [at] aoldotcom> wrote:
>> On 08/07/2010 5:07 PM, Darren New wrote:
>>> What's the metric unit of pressure like this, out of curiousity?
>>>
>
>> 1 psi equals 6,895 Pascals or N/m^2
>
> Isn't it confusing that "pound" is both a unit of mass and of force?
No, it is not a unit of mass:
http://en.wikipedia.org/wiki/Slug_(mass)
Regards,
John
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>> See the other thread about Andrew's heating system, it's also useful that
>> 1 bar ~= 10 metres of water for quick estimations.
>
> Yes, that's the only place I've encountered the term.
In the UK I've seen it on any appliance that is connected to the mains water
or gas, also it's mentioned on tyres and pumps, but most people use psi
still for that. Here in Germany bar is used for everything, you don't want
to be setting the electric tyre pump at the gas station to 24 bar by mistake
:-)
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Warp <war### [at] tagpovrayorg> writes:
> scott <sco### [at] scottcom> wrote:
>> >> it's also useful that 1 bar ~= 10 metres of water for quick estimations.
>> >
>> > I didn't quite understand that.
>
>> It's useful for quick estimations involving water (one of the most common
>> pressurised fluids you come across) because it's a multiple of 10.
>
>> eg a water tank 4 metres above the tap, pressure at the tap is 0.4 bar.
>
>> or, 2 bar coming into your house, what's the pressure at the valve in your
>> roof 6 metres up? 1.4 bar
>
> You mean that when you dive, each 10 meters of depth adds approximately
> 1 bar of pressure?
Yep. Pressure in a liquid is h*g*density (g being 9.8 m/s^2 in most
places).
Since water has a nice density, it works out approximately (take g to be
10).
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John VanSickle <evi### [at] hotmailcom> writes:
> Warp wrote:
>> Stephen <mca### [at] aoldotcom> wrote:
>>> On 08/07/2010 5:07 PM, Darren New wrote:
>>>> What's the metric unit of pressure like this, out of curiousity?
>>>>
>>
>>> 1 psi equals 6,895 Pascals or N/m^2
>>
>> Isn't it confusing that "pound" is both a unit of mass and of force?
>
> No, it is not a unit of mass:
That's what I thought, till I looked it up.
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On 09/07/2010 11:42 AM, Invisible wrote:
>
> Aye.
>
> (Or should that be "i"?)
Nae, aye.
--
Best Regards,
Stephen
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On 7/8/2010 9:49 AM, Tim Cook wrote:
>
http://www.helium.com/items/1882339-doomsday-how-bp-gulf-disaster-may-have-triggered-a-world-killing-event
Just glanced at the article... it smacks of "Oh my god teh world is
going to end!!!111eleven11one!!!111eleventyone
--
~Mike
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Warp wrote:
> Stephen <mca### [at] aoldotcom> wrote:
>> On 08/07/2010 5:07 PM, Darren New wrote:
>> > What's the metric unit of pressure like this, out of curiousity?
>> >
>
>> 1 psi equals 6,895 Pascals or N/m^2
>
> Isn't it confusing that "pound" is both a unit of mass and of force?
And of currency :)
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Am 17.07.2010 05:02, schrieb Nicolas Alvarez:
>> Isn't it confusing that "pound" is both a unit of mass and of force?
>
> And of currency :)
Money: The strongest force in the western world. No confusion there :-P
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On 21/07/2010 9:44 PM, clipka wrote:
> Am 17.07.2010 05:02, schrieb Nicolas Alvarez:
>
>>> Isn't it confusing that "pound" is both a unit of mass and of force?
>>
>> And of currency :)
>
> Money: The strongest force in the western world. No confusion there :-P
I thought it was where you put lost and found dogs. ;-)
--
Best Regards,
Stephen
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clipka <ano### [at] anonymousorg> writes:
> Am 17.07.2010 05:02, schrieb Nicolas Alvarez:
>
>>> Isn't it confusing that "pound" is both a unit of mass and of force?
>>
>> And of currency :)
>
> Money: The strongest force in the western world. No confusion there :-P
Carries a lot of weight, too.
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