Since when are mL's a unit of weight?
 

I ran by a CVS today to pick up some shaving gel, as the stuff I had at home was too large to pass the Kip's Zip muster.

I noticed one brand--Gilette, I believe--that came in a fairly small can. It was labeled "NET WEIGHT: 100mL / 3.4 oz."

I almost laughed out loud in the store. First, this is the WORST example I've ever seen of confusing weight and volumetric measurements; usually, the confusion is on the oz / fl oz end of things, not the mL end! Second, it's uber-convenient, it would seem, that the "weights" match the current TSA guidelines.

I also noticed that my normal travel shave gel, in the exact same size can I already have but which says "Net weight: 5.6 oz" or something like that (which is why I left it at home!) now says, "Net weight: 3.4 oz"

Seems like people are manufacturers are doing all they can to capitalize on Kip's Folly.

All the answers are here: http://imdb.com/title/tt0387808/

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Duh. 1 mL of H2 has the same mass as 1 mL of iron filings.

That would be volume, duh.

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;)

"Go away! I'm batin'"

Mass of 1 ml of H2 depends on the pressure. Volume of a gas, such as H2 is not a meaningful quantity unless pressure and temperature are also given.

You only need to know density. Pressure and temperature have influence over density, but the measurement needed is density.

which weighs more... a ton of feathrs or a ton of bowling balls ;) ask your favorite TSA agent that...

Correct, but do you know densities of agses at various pressures and temperatures?:D

I'm surprised in all this discussion nobody thought about using grams as a unit of weight, thusly -- milligrams or mg.

Sanosuke!

OP has a good point. For water at atmospheric pressure 1 mL = 1 gram, but mL is never a measurement of weight.

Strictly speaking, neither are Kg, g or mg.

Although technically, grams are a unit of mass. Newtons are the unit of force. ^

The imperial units of mass are either the slug or lbm (pounds mass).

Presumably, that's so even the most stupid liquid barker can tell. Like the guy at JFK who told people to throw away their liquids because they weren't labelled, so he "couldn't see what they weigh."

No, I'm not making this up.

After checking out the flick on imdb, I decided to take a look..... My kind of video. I'm #179 on the reserve list at our local library, who owns about 12 copies.... It must have a cult following, I had never heard of it before, and it certainly hasn't shown up on any of my trans-atlantic/pacific United flights as an option :p .

BTW, yes, grams/pounds are mass, not weight.... Weight needs to factor in the force of gravity.

Let's not confuse them, folks...

The whole metric thing was based on 1cc of distilled water weighing 1mg and occupying 1ml of volume.

I'm convinced I could take a Wile E. Coyote Acme anvil in my Freedom Baggie with "3.4oz" on the side of it and get through most checkpoints.

[QUOTE=wb8iny;7389868] I'm #179 on the reserve list at our local library, who owns about 12 copies.... QUOTE]

Blockbuster? Hollywood video? Cable MoD?

Anvils aren't liquid. :)

Though I do wish mercury were easier to obtain in quantity. ;)

1 cc of water = 1g, not 1 mg.

Strange place to find out Mike Judge made a 'new' film. But then again, I think it was 2002 before I found Office Space.

Thanks for the link, although I'm almost afraid to watch it for fear of massive depression.

True. But here on earth, the difference is semantic.

Clean Up at Security Aisle 3
 

What happens when a pax takes a 1 oz hotel shampoo bottle, relabels it "Contents: 5000 US Gallons", and hands it to the JFK dude above in an Approved Kwart Kip Zip? :D

Sorry, I beg to differ with you. You are of b a factor of a thousand. You probably meant that 1cc of water has a mass of 1 gram.

I bet that the aforementioned dude would confiscate the shampoo bottle because ... how is he supposed to know if 5000 US gallons is less or more than 100ml?

I'm also willing to bet that you could re-label all of your shampoo mini-bottles with words to the effect of "Contents: 99ml liquid sarin" and walk straight past 99% of airport security dudes without any questions. (But be ready for a shower of bullets coming your way when you meet the exception to this rule).

:) - just so you know that this is intended as humour.

[QUOTE] Originally Posted by FliesWay2Much View Post
Let's not confuse them, folks...

The whole metric thing was based on 1cc of distilled water weighing 1mg and occupying 1ml of volume.[/QUOTE]

My bad -- I typed too fast last night. It's 1 gram of weight -- not 1mg

[QUOTE=FliesWay2Much;7394099]As I was corrected by Yaatri, its 1 gram of mass. But as I posted earlier, the difference between mass and weight on earth (near sea-level) is semantic.

this is madness!!

[QUOTE=osxanalyst;7394418]No it's not - it is quite important. It is just our everyday life experience is 9.8 m/sec^2 and that is only at sea level and also where all the mass/weight conversions are supposedly done.

And for the the mass of mL record, 1 g at 4 degrees C. Water is unique in that its density is a maximum instead of more or less linear function as most other compounds.

[QUOTE=carpboy;7400326]Like I said, semantic. My undergrad degree was in Mech Engineering with a focus on fluid mechanics, so I know all the scientific nuances. But for the everyday person the distinction between the two is irrelevant.

[QUOTE=osxanalyst;7400351]I knew there were some other constraints (like a fixed temperature and pressure) but couldn't remember them from Freshman Chemistry -- that was a long time ago!

All Based on water ... H2O

1 gram H2O = 1 ml H2O = 1 cubic centimeter H2O

Weight, volume and dimensions of other substances are not equal. Only for water.