Thermodynamics B/C

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Re: Thermodynamics B/C

Post by JoeyC » February 20th, 2019, 3:26 pm

Errr, I'm pretty sure that any ES would interpret the rules in the reasonable manner; that's a bit extreme logic there.
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Re: Thermodynamics B/C

Post by satvik03 » February 22nd, 2019, 8:26 am

Also, k values are negative. The best k values are those that are closest to zero. Something like -0.0001 would easily win, and get 20 points.
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Re: Thermodynamics B/C

Post by nateDC » February 22nd, 2019, 12:39 pm

satvik03 wrote:Also, k values are negative. The best k values are those that are closest to zero. Something like -0.0001 would easily win, and get 20 points.
Wouldn't a k value of -0.001 be better than -0.0001 because -0.001 is lower? And thus, a (hypothetical) k value of -1 would be even better, because it's even lower. K value closest to 0 isn't best, lowest k value is best.
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Re: Thermodynamics B/C

Post by UTF-8 U+6211 U+662F » February 22nd, 2019, 1:22 pm

nateDC wrote:
satvik03 wrote:Also, k values are negative. The best k values are those that are closest to zero. Something like -0.0001 would easily win, and get 20 points.
Wouldn't a k value of -0.001 be better than -0.0001 because -0.001 is lower? And thus, a (hypothetical) k value of -1 would be even better, because it's even lower. K value closest to 0 isn't best, lowest k value is best.
According to the rules, closest to 0 is best. This makes sense since a k value closer to 0 yields a lower temperature drop.

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Re: Thermodynamics B/C

Post by CookiePie1 » February 22nd, 2019, 1:46 pm

UTF-8 U+6211 U+662F wrote:
nateDC wrote:
satvik03 wrote:Also, k values are negative. The best k values are those that are closest to zero. Something like -0.0001 would easily win, and get 20 points.
Wouldn't a k value of -0.001 be better than -0.0001 because -0.001 is lower? And thus, a (hypothetical) k value of -1 would be even better, because it's even lower. K value closest to 0 isn't best, lowest k value is best.
According to the rules, closest to 0 is best. This makes sense since a k value closer to 0 yields a lower temperature drop.
if -1 was the best k value i might as well bring a chunk of metal as my box...
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Re: Thermodynamics B/C

Post by platinum02 » February 22nd, 2019, 10:54 pm

Is stopping convection really going to make a difference in my k-value? I am thinking of adding a bunch of foam bits and pieces in between layers of foam and also around my beaker where there are gaps in insulation.

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Re: Thermodynamics B/C

Post by JoeyC » February 23rd, 2019, 5:04 am

No, not really. Just make sure there's as little free space in your box as possible to increase thickness instead.
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Re: Thermodynamics B/C

Post by platinum02 » February 23rd, 2019, 2:58 pm

Thanks. By the way, is the foam color that I use going to change much? Right now, I have white-colored foam, so it doesn't absorb as much radiation from the surroundings. Is this more ideal than darker-colored foam?

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Re: Thermodynamics B/C

Post by JoeyC » February 23rd, 2019, 3:01 pm

It doesn't really matter that much. If you're going to talk about radiation though, use reflective foil/other like material to reflect radiation. Line the inside.
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Re: Thermodynamics B/C

Post by adarsh » February 23rd, 2019, 5:51 pm

Are we allowed to tape down the lid of our box after putting the beaker in?

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