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The weight of one cubic centimeter of water is in fact one gram. By definition.
by ksenzee 11y ago
The weight of one cubic centimeter of water is in fact one gram. By definition.
- AnimalMuppet 11y agoOnly at one specific temperature (4 degrees C).
- jcranmer 11y agoNot by definition: a kilogram is defined as the exact mass of a lump of iridium-platinum alloy sitting in a vault in Paris (well, Sèvres). But the kilogram was designed to be the weight of a liter of water at its melting point, and then later 4°C (where water achieves maximum density).
- aexaey 11y agoOne cubic centimetre of water at 4 degrees Celsius used to define one gram (or more precisely one litre -> one kilogram, which comes out to be the exact same thing) [1], [2]. Although 1 cm^3 of water is still pretty damn close to 1g. [1] https://en.wikipedia.org/wiki/Grave_%28unit%29 https://en.wikipedia.org/wiki/Grave_%28unit%29 [2] https://www.youtube.com/watch?v=ZMByI4s-D-Y https://www.youtube.com/watch?v=ZMByI4s-D-Y (around 1:50, and actually the whole video is excellent)
- garyclarke27 11y agoYes it is sorry and thanks, I knew that 1 ml = 1 but I did not check out my incorrect instinct re volume. I was thinking of 5 grams to a teaspoon, intuitively 5 cc seems to me, much bigger than 1 small teaspoon. Still surprising to me though, how 5 grapes can fit on a teaspoon ?