- #1

BMcN

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

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- Thread starter BMcN
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- #1

BMcN

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

- #2

Ambitwistor

- 841

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1 bar = 100,000 pascals = 100,000 kg/m/s^{2}

- #3

BMcN

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Bit higher than I remember, but thanks!

- #4

chroot

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Should be kg/m-sOriginally posted by Ambitwistor

1 bar = 100,000 pascals = 100,000 kg/m/s^{2}

- Warren

- #5

Ambitwistor

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Either way works.

- #6

chroot

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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

- #7

Chi Meson

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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.

- #8

Njorl

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

Njorl

Njorl

- #9

chroot

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Uh... no.Originally posted by Chi Meson

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.

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

- #10

Ambitwistor

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

1 bar = 3.4595574 hpdpcf's

- #11

chroot

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I see your Schwartz is as big as mine.Originally posted by Ambitwistor

1 bar = 3.4595574 hpdpcf's

http://www.google.com/search?num=10...+decades+per+cubic+furlong&btnG=Google+Search

- Warren

- #12

Ambitwistor

- 841

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Code:

```
$ units
2084 units, 71 prefixes, 32 nonlinear units
You have: bar
You want: horsepower-decade/furlong^3
* 3.4595574
/ 0.28905432
```

- #13

chroot

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You think you're better than me, punk?

- Warren

- Warren

- #14

Chi Meson

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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.

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