Half a croissant, on a plate, with a sign in front of it saying '50c'
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Volumetric Bathtub

Math in the Bath
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A white bathtub featuring inscribed black lines and figures marking litres, gallons, etc.

A small collection of variously sized and weighted rubber duckies are used to aid in volume and weight measurement/calculations of buoyancy non-neutral items.

Or just played with because... rubber duckies.

FlyingToaster, Apr 06 2018

Nods to [Vernon]'s Volumetric_20Flask
for inspiration. [FlyingToaster, Apr 06 2018]

[link]






       I suppose that combined with the use of a normal bathroom scale this would allow easy calculation of one’s BMI for those who are into that sort of thing.
AusCan531, Apr 06 2018
  

       Quick, get out that instant Patent Kit...   

       9 Jan 2018 "During a keynote address in Las Vegas, Intel revealed its plans for the future of immersive media...."
not_morrison_rm, Apr 07 2018
  

       //suitable for both volume and weight measurement// Volume, yes, but weight, no. A brick made of lead and one of the same size made of aluminium will give the same answer.
MaxwellBuchanan, Apr 07 2018
  

       // Volume, yes, but weight, no. // Yes to both, actually :   

       that's where the rubber ducky(s) come in, to balance the object in case it's too light to get proper volume (by adding enough weight to barely sink it (though that can be accomplished by simply pushing it underwater)), or too heavy to get proper weight (by adding buoyancy to barely float it).
FlyingToaster, Apr 07 2018
  

       Oddly enough, [FT], I do believe you're right. Have a bun on me.
MaxwellBuchanan, Apr 07 2018
  

       Is that a regular bun, or a buoyant rubber fake bun ?
8th of 7, Apr 07 2018
  

       It is merely a bun. An echt bun. A bun in and of itself.
MaxwellBuchanan, Apr 07 2018
  

       It’s a bun of the type used to make sub sandwiches obviously.
AusCan531, Apr 07 2018
  

       [+] Maybe a waterproof sticker and some setup instructions for those of us whom can't replace our bath tubs on a scientific desire.
wjt, Apr 13 2018
  
      
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