Thermodynamics B/C

[Tesel]

I don’t think plastic beakers can be made of polystyrene (for one, they’d be done if you tried to put acetone in them). If I had to make a guess based on what I know about polymers from Forensics, the most likely case is that they’re made from high density polyethylene or polyethylene terephthalate. Polycarbonate is also possible, but less so than one of the other two.

Yeah, I was wrong. The beakers I got had no official specs with regards to material, so your guess is as good as mine. I saw polystyrene when I was looking at something else, and I'm struggling to remember what.

Did it have a recycling number on it?

I believe they're supposed to ship this afternoon, so I'll check then. Good call!

[arv101]

Anyone in the east coast (upper) going to Rustin invitational?

[shrewdPanther46]

Anyone in the east coast (upper) going to Rustin invitational?

I believe I am. Not sure exactly though...

Anyways, I'm not doing thermodynamics. Good luck (don't screw up)

[Crtomir]

With all this talk about aero-gels, most of the ones that are cheap enough are aero-gel beads, not monolithic blocks of aero-gel. A 20x20 cm monolithic block of aero-gel is prohibitively expensive. Filling up a box with aero-gel beads leaves a lot of interstitial space between the beads that is filled with just air. I am wondering if, in the end, aero-gel beads actually work better than just a solid styrofoam block or if, because of the air gaps, the composite system becomes less insulative than just a simple solid styrofoam block? Has anyone taken any real data on this to PROVE that aero-gel beads packed in a box perform better than a solid block of styrofoam?

Anyone have thoughts on this?

[Crtomir]

Another question: ICE WATER BONUS

Is it worth it?

[kendreaditya]

in 3e. the rules states that the hole has to be directly above the device. My hole comes in at a angle, is this ok?

[WhatScience?]

Another question: ICE WATER BONUS

Is it worth it?

I don't really think it is...I am pretty sure that the points you get are minimal and due the possibility of varying temperature in ice water, would become harder to accurately predict..

[WhatScience?]

With all this talk about aero-gels, most of the ones that are cheap enough are aero-gel beads, not monolithic blocks of aero-gel. A 20x20 cm monolithic block of aero-gel is prohibitively expensive. Filling up a box with aero-gel beads leaves a lot of interstitial space between the beads that is filled with just air. I am wondering if, in the end, aero-gel beads actually work better than just a solid styrofoam block or if, because of the air gaps, the composite system becomes less insulative than just a simple solid styrofoam block? Has anyone taken any real data on this to PROVE that aero-gel beads packed in a box perform better than a solid block of styrofoam?

Anyone have thoughts on this?

Honestly, my thoughts are don't waste your money on aerogel...with the way the competition is structured, it's not worth it...plenty of other decent insulators out there

[arv101]

Anyone in the east coast (upper) going to Rustin invitational?

I believe I am. Not sure exactly though...

Anyways, I'm not doing thermodynamics. Good luck (don't screw up)

Um okay thanks?

[arv101]

10. Which of the following is not a type of thermodynamic system?
a. Open
b. Insulated
c. Closed
d. isolated

Why is it C and not B ?( This was from a test I found online, did they screw up or am I missing something big)?