2011/9/26 Jed Rothwell <[email protected]>:
> Jouni Valkonen <[email protected]> wrote:
>
>>
>> > Yup, stirring is the problem. You need to stir vigorously with a stick
>> > or
>> > something like a Dremel tool with a paint mixer attached. (Like a giant
>> > eggbeater.)
>> >
>>
>> That is untrue, it is not a problem. It really does not need much
>> efforts to stir 10 kg water . . .
>
> Did you do this test? I have done it, and in my experience mixing is a
> problem. You need to mix it more vigorously than the person did in this
> video.
>
Yes, I have done several titration tests in chemistry lab and indeed I
have found out that it does not take much more than few seconds when
liquid is fully mixed in Erlenmeyer flask.
I think that we have here huge semantic problem, not real problem.
When I am saying that there is a problem, I am referring an intrinsic
methodological problem for the experimental setup (Levi's steam
experiments had methodological problems). Instead if I say that there
is no problem, that means that it is possible to calculate exact
amount for stirring that is required so that we can say that water is
fully mixed let's say in 68 seconds. Calculating the amount of
stirring is elementary fluid dynamics, but stirring level is also very
easy just to calibrate, so that there is no need for boring
mathematical analysis.
–Jouni
