# Talk:Orders of magnitude (density)

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## Human density

Shouldn't the average human density be 0.9xx kg/m^3? Since humans are capable of floating in water I doubt the density will be close to 1000.--2ltben 03:22, 1 September 2006 (UTC)

No Water is about 1000456 kg/m3 as it is about 1 kg/litre. I believe an early definition of a kg was the "weight" (mass) of a litre of water. Crysta1c1ear 19:53, 28 December 2006 (UTC)

I found a 1966 US government study on human body density (well, my gf found it). I averaged the densities in Table 1 to come up with 1062 kg/m3 instead of the previously quoted and uncited value of 1010 kg/m3. This study contains no data for females, but I figured a documented value that only accounts for males is better than an undocumented value. I assume that the difference in density would not be significant between males and females. Also, it should be noted that this study has a rather small sample size (14 people), but again, a documented number is better than an undocumented one, or at least that was my philosophy. Tha A-Bomb 14:59, 07 August 2012

## Iridium

There seems to be uncertainty about the actual density of iridium and how it was calculated. See the article on iridium for the info.

Fixed -84user (talk) 15:23, 13 October 2010 (UTC)

## Best vacuum from a laboratory (1 pPa)

Is two orders of magnitude too low. 10e-14 torr is about 80 pPa which is sth like 1e-16 Pa. Not sure how to edit tables so sorry for not correcting it myself. — Preceding unsigned comment added by 94.173.154.109 (talk) 20:41, 22 April 2015 (UTC)