Page 23 of 26

Re: Thermodynamics B/C Build

Posted: February 17th, 2019, 6:30 pm
by JoeyC
Unless you're testing in a controlled environment, inconsistencies will always be there. Especially due to the fact that all ESes are human and can't definitively replicate proper testing conditions to a point; a robot may not even be able to do that. Just plan accordingly and go with your gut.

Re: Thermodynamics B/C Build

Posted: February 18th, 2019, 5:54 pm
by Luna01
Where can u find a beaker with those specific parameters?

Re: Thermodynamics B/C Build

Posted: February 18th, 2019, 6:03 pm
by UTF-8 U+6211 U+662F
Luna01 wrote:Where can u find a beaker with those specific parameters?
Any beaker that's close will do, as long as you use it for all your tests. Your science teacher probably has a 250 mL beaker lying around somewhere, and you can ask to borrow it for the season.

Re: Thermodynamics B/C Build

Posted: March 1st, 2019, 12:01 am
by platinum02
Is the k-value calculated using the initial temperature of the water before the water is in the beaker or is it using the initial temperature of the water at the first reading from the thermometer after the water is already in the beaker and inside the box?

Re: Thermodynamics B/C Build

Posted: March 1st, 2019, 4:23 am
by CookiePie1
platinum02 wrote:Is the k-value calculated using the initial temperature of the water before the water is in the beaker or is it using the initial temperature of the water at the first reading from the thermometer after the water is already in the beaker and inside the box?
Yeah, k-value is based on the temperature of the source bath, which is kept constant for all teams.

Re: Thermodynamics B/C Build

Posted: March 1st, 2019, 4:44 am
by JoeyC
Is it? I think on some of mine they used the temperature after pouring; they can try, but the source bath's temperature never actually stays the same. In my competitions it usually drops at least 5*C if not more over the course of their water distribution.

Re: Thermodynamics B/C Build

Posted: March 1st, 2019, 6:48 am
by UTF-8 U+6211 U+662F
JoeyC wrote:Is it? I think on some of mine they used the temperature after pouring; they can try, but the source bath's temperature never actually stays the same. In my competitions it usually drops at least 5*C if not more over the course of their water distribution.
If it's plugged in properly, the source bath should stay the same. Your beaker water might drop dramatically though.

Re: Thermodynamics B/C Build

Posted: March 1st, 2019, 8:16 am
by JoeyC
They didn't plug it in, they just filled a teakettle-like container and brought it around (giving it 10 minutes to cool before it reached us).

Re: Thermodynamics B/C Build

Posted: March 2nd, 2019, 10:50 am
by satvik03
My device has dropped like 10 degrees at competitions before.

Re: Thermodynamics B/C Build

Posted: March 2nd, 2019, 3:04 pm
by wec01
UTF-8 U+6211 U+662F wrote:
JoeyC wrote:Is it? I think on some of mine they used the temperature after pouring; they can try, but the source bath's temperature never actually stays the same. In my competitions it usually drops at least 5*C if not more over the course of their water distribution.
If it's plugged in properly, the source bath should stay the same. Your beaker water might drop dramatically though.
Yeah, usually just the transferring of the water from the bath to the beaker is enough to drop the temperature a considerable amount, even if the beaker is in the device.