Re: gEDA-user: PCM making methods - was - Re: alarm clock update

[Christoph Lechner <cl0023@xxxxxxx>]

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John Griessen wrote:
> Hmm....  "recommend optimum specific gravity to be between 1.240 to 1.330"
> 
> I wonder if the wine gravity gauge I have has that range....
AFAIK the density of ethanol is below 1g/cm^3 :)

I'd prefer a hydrometer as used when measuring the density of the acid
in car batteries. IMHO the ideal density value of the sulfuric
acid/water mixture in the car battery is in the range of 1.3g/cm^3:
A fully charged car battery has an electrolyte density of 1.28g/cm^3,
while a completely discharged car battery has one of about 1.1g/cm^3.

- - C. Lechner


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