Talk:Slug (mass)

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[edit] mass

How can its mass depend on g? Surely it must be independent of it?

What is the mass of one cubic foot of water? W = 62.4 lbs per cubic foot, g = 32.2 ft/s2

mass = W/g = 62.4 lbs/ft3 x [1/(32.2 ft/s2)] = 1.94 (lbs s2)/(ft4)

Please, tell me if I am right. If not, what is wrong.

[edit] typography

What the hell does "14.593 90 kg" mean? Is this 1.59390 kg? 14,593.90 kg? I'm a reasonably informed reader and I can't parse this. Anyone have an explanation for this format? ericg ✈ 21:24, 16 November 2006 (UTC)


i think this means 14.59390Kg, or rounded to 14.59Kg. =)


It's the correct way of writing 14.59390 kg in the SI metric system. Full stops can be used as decimal points (though commas are recommended) and spaces are used as the digit grouping symbol, in groups of three, to the left and right of the decimal point. See the definitions of SI in the International Standards Organization documents ISO-31 and ISO 1000.

Explanation: The US and the USA use a full stop (US: period) as the decimal point symbol and they use the comma as the digit grouping symbol. Other countries, including France, the founder country of the metric system, do exactly the opposite.

1.234 means "one point two three four" to an Englishman and "one thousand two hundred and thirty four" to a Frenchman.


So, to avoid confusion, SI specifies that the space (ideally a printer's "thin space" if possible) must be used as the digit grouping symbol. It also says (quite reasonably) that you can group digits to the right of the decimal point.

Sadly, the Wikipedia Manual of Style says that numbers attached to SI units must not be written in the style mandated by the documents that define the SI system, but instead the customary US-UK rules must be applied to SI units. (Which I think is daft.) Hope that helps. Blaise 17:23, 29 June 2007 (UTC)

[edit] Metric slug

There is no metric slug, (N)Newtons are for that, the slug is the imperial version of Newton. It is an invention of american who doesn't understand Newtons. This 9.80665 is the gravitional constant. So for people out of the US :"Don't use kgf or metric slug, people will laught at you." —The preceding unsigned comment was added by 209.161.248.198 (talk • contribs).

I don’t know whether the term “metric slug” is or rather was indeed used in the English-speaking technical world, but hyl and TME were in fact defined by standards bodies, but are long deprecated—so are all units that enclose (gravitational) constants, such as the kilopond / kilogram-force.
I am not sure whether the hyl was a cm-g-s or a m-kg-s unit, though. Christoph Päper 15:28, 15 February 2007 (UTC)

I want to delete the pop culture reference. I don't see how it is relevant to this article. I hope I want be bugged by a revert bot. —Preceding unsigned comment added by 207.43.190.31 (talk) 22:50, 6 January 2008 (UTC)

  • It's not nonsense. Slug is a very uncommon unit. To hear it in a movie or anywhere is rare. But whatever... -Fnlayson (talk) 22:54, 6 January 2008 (UTC)

[edit] Units

The units wear incorrect on this page, it appears in the history that they were correct and the page was changed at some point. I changed them back, and used the Math formatting so it is easier to see the relationship. I'm not sure why there is a controversy as to the units, but for slugs to be consistent with my fluid mechanics text book this change was necessary.Zath42 (talk) 22:27, 17 February 2008 (UTC)

Your changes were incorrect. I have reverted them. Rracecarr (talk) 22:34, 17 February 2008 (UTC)
The units for slugs work out just fine using F = ma. So the units are [lbf] = [lbf-s2/ft]*[ft/s2] = [lbf]. -Fnlayson (talk) 22:48, 17 February 2008 (UTC)
It was a typo in my fluids book, not repeated later in the book...Zath42 (talk) 08:38, 26 February 2008 (UTC)

[edit] Blob

I removed this definition which was added last October unreferenced by an anonymous user:

The unit blob is the inch version of slugs (1 lbf·s²/in).

SockPuppetForTomruen (talk) 20:24, 12 April 2008 (UTC)

http://www.designofmachinery.com/MD/ for blobs, also 'slinch' is a gross of blobs, not the inch version of slugs (whoever added it had the conversion wrong, it would have to be 1/12 a slug not 12 slugs)
12 slugs = 1 slinch
1 slugs = 1/12 slinch
, this is because
1 [slug] =1 \cfrac{[(lbf)(s^2)]}{[ft]}
and
1 [slinch] =1 \cfrac{[(lbf)(s^2)]}{[in]}

and since 1 foot = 12 inches

1 [slug] =1 \cfrac{[(lbf)(s^2)]}{[ft]} =1 \cfrac{[(lbf)(s^2)]}{12[in]}

do some algebra (multiply all sides by 12) to get

12 [slug] =12 \cfrac{[(lbf)(s^2)]}{[ft]} =1 \cfrac{[(lbf)(s^2)]}{[in]}
I don't understand the blob. Is there only that one source for the information on the blob? A Google search is useless as there are too many movies or other things named blob. Could 12 blobs = 1 slug(1/12 slugs = 1 blob) as you where saying is the cases of the slinch? Is that the difference between the slinch and the blob?R00m c (talk) 03:29, 16 April 2008 (UTC)
yes, they are the same. —Preceding unsigned comment added by 130.215.238.136 (talk) 07:03, 16 April 2008 (UTC)