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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