Gryoscopic fluid suspension is usually accomplished with a ferrofluid
Typical densities range from 850 kg/m3 for oil based ferrolfluids to 1400 kg/m3 for water based ones.
The liquid must have weighed over 100lbs in a 5 gallon can.
Was the 100lbs a guess or an actual weighing and did this include the can and was that Imperial or US Gallons and was the volume a guess as well?
I ask this because of these comparisons.
1 UK gallon of water weighs 10 lbs and a US gallon about 8.4 lbs.
By comparison with imatfaal's figures
Earth and rock is about 2000 - 2200 kg/m3
Concrete is 2200 - 2400 kg/m3
Edited by studiot, 29 November 2016 - 01:34 PM.