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Re: Thermodynamics B/C

Posted: April 8th, 2018, 7:09 pm
by TheChiScientist
Interesting. I will take this into account next year :D

Re: Thermodynamics B/C

Posted: April 9th, 2018, 1:11 pm
by arv101
TheChiScientist wrote:Wait a minute! I keep hearing all this talk of different beakers.Are you, people implying that the rules allow different material beakers? :?: If so what type of beakers are you people using? I am using Pyrex Beakers.
Wait the rules don't say anything about the material right?

Re: Thermodynamics B/C

Posted: April 9th, 2018, 1:37 pm
by CookiePie1
arv101 wrote:
TheChiScientist wrote:Wait a minute! I keep hearing all this talk of different beakers.Are you, people implying that the rules allow different material beakers? :?: If so what type of beakers are you people using? I am using Pyrex Beakers.
Wait the rules don't say anything about the material right?
The rules say "2 identical, unaltered, glass or plastic, standard (height~1.4 times the diameter) 250 mL beakers;"

Re: Thermodynamics B/C

Posted: April 9th, 2018, 2:32 pm
by JoeyC
However, they don't usually check the height of the beaker rule; I've seen quite a few plastic pyrex beakers that violate that rule but are still allowed to be used in competition by the event procters

Re: Thermodynamics B/C

Posted: April 9th, 2018, 2:38 pm
by TheChiScientist
Interesting but then that means plastic beakers are better insulators :D

Re: Thermodynamics B/C

Posted: April 9th, 2018, 2:48 pm
by CookiePie1
TheChiScientist wrote:Interesting but then that means plastic beakers are better insulators :D
But it doesn't matter because your external beaker is also plastic.

Re: Thermodynamics B/C

Posted: April 9th, 2018, 2:56 pm
by Alex-RCHS
I don't think the 1.4 rule is supposed to be extremely specific. It's just so people don't come in with graduated cylinders or something like that.
CookiePie1 wrote:
TheChiScientist wrote:Interesting but then that means plastic beakers are better insulators :D
But it doesn't matter because your external beaker is also plastic.
It probably matters less, but I think you'd have to do some testing to see if it doesn't matter at all. But certainly its effect is tiny, if at all.

Re: Thermodynamics B/C

Posted: April 9th, 2018, 2:57 pm
by TheChiScientist
Still, every point counts. :D

Re: Thermodynamics B/C

Posted: April 10th, 2018, 3:21 pm
by arv101
JoeyC wrote:However, they don't usually check the height of the beaker rule; I've seen quite a few plastic pyrex beakers that violate that rule but are still allowed to be used in competition by the event procters
When you say that the plastic beakers violate the rule you mean because of their height/ dimensions right? Its not because of its material or company right?

Re: Thermodynamics B/C

Posted: April 10th, 2018, 3:57 pm
by JoeyC
Yes, their heights aren't near 1.4 times their diameters; these are mainly the wide plastic pyrex beakers.