weight

[my100000poun]

How much does 1 litre of fluid weigh in Kg or g

[BigMac]

I ltr = I kg

... or so I remember from school several hundred years ago

[shammydodger]

Depends on the identity of the fluid and the acceleration due to gravity of the environment. I litre of water has a mass of 1kg, be it on Earth, Jupiter or anywhere else for that matter. On Earth, I litre of water will weigh 9.8 Newtons (approximately.) I litre of mercury, on the other hand, will have a mass of 13.6kg and a weight of approximately 9.8 x 13.6 (Newtons.)

As an added note of pedantry, the "k" in "kg" is lowercase, as uppercase "K" is used as the symbol for Kelvins.

[shammydodger]

Weight isn't measured in grammes or kilogrammes. These are units of mass. While that may seem pedantic, this is a science forum and much of science is based around the accurate definition of terms and units, as well as their correct usage.

[mibn2cweus]

The chart found by clicking on the link below lists 150 different liquids. The value listed corresponds to the approximate weight of these liquids in grams per litre.

table here

[Fitzer]

Well since it has been noted that this is the science area and accuracy is important I'm surprised that no-one has pointed out that we all seem to be speaking as if fluid is the same as liquid which of course it isn't. Fluids are a subset of the phases of matter including liquids, gases, plasmas and to some extent plastic solids.

Removes pedant hat and gets coat.

[shammydodger]

Touche Fitzer

Time for a pint or two of fluid!

[ugly_bob]

Also, since a litre is ameasure of volume, the 'weight' depends on the pressure upon which that volume is subjected.

1 litre of water at 21degC (room temp.) has mass of 1kilogram.

I'm sure there is a more scientific defintion than this, hence the SI units of mass, blah de blah de blah



Sorry. Just got back from pub

[shammydodger]

No it doesn't. Let me spell this out very slowly so that our drunk friends can understand. Mass does not depend on anything other than the quantity of matter. Weight depends on the acceleration due to gravity of the environment in which the measurement is made, more commonly known as "gravity." I suggest that you sober up and reassess what you wanted to slur.

[ugly_bob]

sorry.

consider me duly chastised

I hereby promise not to use theanswerbank drunk again

until tomorrow at least ;-)


I knew what I meant. just didn't come out properly.

Note to self - don't try scientific arguments after drinking Stella!!

[shammydodger]

Bob

Duly noted. And I'm not immune to doing the same thing myself! :)

[Space]

The kilogram was originally defined as the mass of one litre of pure water at a temperature of 3.98 degrees Celsius, where water has its maximum density, and standard atmospheric pressure
(from Wikipedia)

[BigMac]

So I was right, then?

[shammydodger]

No, because as my 1st post pointed out, the mass of 1 litre of fluid depends on, amongst other things, the identity of the fluid. So the equation 1 ltr = 1 kg only holds when the fluid is water (at the conditions detailed by Space.) :)