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A comment on Antikythera Mechanism: An ancient 'computer' that 'shouldn't exist' [video]. Parent comment

Re:Antikythera Mechanism: An ancient 'computer' that 'should... by mcguire on Friday December 10, 2021 @02:36PM (#29514469)
That gas holder article says they contained methane or coal gas. Methane's density is 0.657 kg/m³; hydrogen's is 0.08375 kg/m³.
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Re:Antikythera Mechanism: An ancient 'computer' that 'should... by Robotbeat on Friday December 10, 2021 @04:02PM (#29515416)
Coal gas is a mix that (by energy) is about half hydrogen, as I said. And hydrogen gas a specific energy of 142MJ/kg vs 55.5MJ/kg for methane.
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