1 Bar = ?

[BMcN]

What the conversion for bar so that I can use it to work out volume and temprature? Whats the units?

[Ambitwistor]

1 bar = 100,000 pascals = 100,000 kg/m/s2

[BMcN]

Bit higher than I remember, but thanks! [:D]

[chroot]

Originally posted by Ambitwistor
1 bar = 100,000 pascals = 100,000 kg/m/s2
Should be kg/m-s2 [:D]

- Warren

[Ambitwistor]

Either way works.

[chroot]

Not to be a pain in the ***, but I'd normally think

kg/m/s^2 = kg s^2 / m

But I guess it does come down to the conventional order of operations. I guess you win. Gack. I personally hate when people describe accelerations as "meters per second per second" i.e. m/s/s, for the same reason.

- Warren

[Chi Meson]

Interesting note:

In the "common" world, a bar has the unit "kg/cm^2". THis is referring to the weight of one kilogram per square centimeter. THis of course translates to only 98,010 N per square meter, but somewhere along the line, "g" got upgraded to 10 N/kg instead of 9.801 N/kg.

[Njorl]

So what is it in hpdpcf's (horsepower-decades per cubic furlong)?

Njorl

[chroot]

Originally posted by Chi Meson
Interesting note:

In the "common" world, a bar has the unit "kg/cm^2". THis is referring to the weight of one kilogram per square centimeter. THis of course translates to only 98,010 N per square meter, but somewhere along the line, "g" got upgraded to 10 N/kg instead of 9.801 N/kg.
Uh.... no.

1 bar is defined to be 100 kilopascals. A pascal is one newton per square meter. One kilogram-force is g newtons. Therefore, one pascal is (1/g) kilogram-force per square meter. Therefore, one bar is 100,000/g kilograms-force per square meter.

g is accepted to be 9.80665 m/s^2, so one bar is 10,197.1621298 kilograms-force per square meter.

I have no idea where you got the idea that someone rounded g to 10 m/s^2, but it never happened.

- Warren

[Ambitwistor]

So what is it in hpdpcf's (horsepower-decades per cubic furlong)?


1 bar = 3.4595574 hpdpcf's

[chroot]

Originally posted by Ambitwistor
1 bar = 3.4595574 hpdpcf's
I see your Schwartz is as big as mine.

http://www.google.com/search?num=100&hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off&q=1+bar+in+horsepower+decades+per+cubic+furlong&btnG=Google+Search

- Warren

[Ambitwistor]

I used the Unix 'units' program, since I had a shell already open ...


$ units
2084 units, 71 prefixes, 32 nonlinear units

You have: bar
You want: horsepower-decade/furlong^3
* 3.4595574
/ 0.28905432

[chroot]

You think you're better than me, punk?






[:D]

- Warren

[Chi Meson]

Originally posted by chroot
Uh.... no.

1 bar is defined to be 100 kilopascals. A pascal is one newton per square meter. One kilogram-force is g newtons. Therefore, one pascal is (1/g) kilogram-force per square meter. Therefore, one bar is 100,000/g kilograms-force per square meter.

g is accepted to be 9.80665 m/s^2, so one bar is 10,197.1621298 kilograms-force per square meter.

I have no idea where you got the idea that someone rounded g to 10 m/s^2, but it never happened.

- Warren

That's not what I meant, really. In Europe, the unit of bar and kg/cm^2 is used interchangeably (not by scientists, but by people pumping their bike tires). I remember several times over the years hearing anecdotaly that the bar was based on the "kg/cm^2" but was then redefined to be essentially 10 N/cm^2 (actually 1,000,000 dynes per cm^2)to be scientifically correct.

So g was not the one that was adjusted. It's the bar that was raised.