Thermodynamics B/C

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Re: Thermodynamics B/C

Post by kendreaditya » January 28th, 2018, 8:43 pm

AveryMaster456 wrote:What should i include in a binder for the thermodynamics written test?
All of wikipedia...jk, You can take notes from Hyperphysics, thermo videos from youtube, ect. Just include:
- Temperature scales and conversions, definitions of heat units
- Thermal conductivity, heat capacity, specific heat, latent heat, phases of matter, entropy, enthalpy
- Thermodynamic laws and processes (e.g. Carnot cycle and efficiency, adiabatic, isothermal)
- The history of thermodynamics

(this was from the rules)

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Re: Thermodynamics B/C

Post by kendreaditya » January 28th, 2018, 8:44 pm

LittyWap wrote:Well it's sad to say guys, but no-one (as far as I can tell) took my test!

Here's the link to the test and answer key if you want it. PM me if you want clarification on a question.

I think I may have scared everyone off with my warnings.


Test: https://adobe.ly/2Dnfrhu
What if we run it again but this time people who participate get and invitational test.

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Re: Thermodynamics B/C

Post by FRahman » February 1st, 2018, 7:51 pm

Is anyone willing to provide a list of the equations they have on their binder? It would be very helpful, thanks.

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Re: Thermodynamics B/C

Post by ElPotato » February 1st, 2018, 8:01 pm

FRahman wrote:Is anyone willing to provide a list of the equations they have on their binder? It would be very helpful, thanks.
The equations found here (http://hyperphysics.phy-astr.gsu.edu/hbase/heacon.html) are good resources to print to put in binders. I have some of them myself.
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Re: Thermodynamics B/C

Post by connerywood18 » February 2nd, 2018, 9:03 pm

One thing I have noticed in past tournaments is that several teams are allowed to leave their thermometers inside their device during the testing time. So I have a few questions:

1. Is this allowed? By the rule that states that the hole must remain unobstructed during testing time, I don't think so.

2. On the unlikely possibility it is allowed, is it a good idea?

3. If it is not allowed, should I stop people from doing it (is it a good idea) and if so how?

Thanks!

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Re: Thermodynamics B/C

Post by arv101 » February 3rd, 2018, 8:32 am

connerywood18 wrote:One thing I have noticed in past tournaments is that several teams are allowed to leave their thermometers inside their device during the testing time. So I have a few questions:

1. Is this allowed? By the rule that states that the hole must remain unobstructed during testing time, I don't think so.

2. On the unlikely possibility it is allowed, is it a good idea?

3. If it is not allowed, should I stop people from doing it (is it a good idea) and if so how?

Thanks!
Honestly, at no competition have I seen this event run correctly. Which isn't entirely the supervisors fault because this event is quite hard to run. At my most recent competition the es let us write the temperatures down ourselves with pencil. Now the rules say that you are allowed to use your own thermometer to measure the starting temperature. I am pretty sure you are not supposed to leave the thermometer in but in any case you should have already written your prediction down and handed it to the es.

Let me know if that sounded confusing.
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Re: Thermodynamics B/C

Post by JoeyC » February 3rd, 2018, 3:38 pm

arv101 wrote:
connerywood18 wrote:One thing I have noticed in past tournaments is that several teams are allowed to leave their thermometers inside their device during the testing time. So I have a few questions:

1. Is this allowed? By the rule that states that the hole must remain unobstructed during testing time, I don't think so.

2. On the unlikely possibility it is allowed, is it a good idea?

3. If it is not allowed, should I stop people from doing it (is it a good idea) and if so how?

Thanks!
Honestly, at no competition have I seen this event run correctly. Which isn't entirely the supervisors fault because this event is quite hard to run. At my most recent competition the es let us write the temperatures down ourselves with pencil. Now the rules say that you are allowed to use your own thermometer to measure the starting temperature. I am pretty sure you are not supposed to leave the thermometer in but in any case you should have already written your prediction down and handed it to the es.

Let me know if that sounded confusing.
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Oh my gosh, that's just ridiculous, but so true.
And in response to that question, I've always left mine in, and it's been allowed. Plus believe that leaving the thermometer in is beneficial if you're the water is at a relatively low temperature as it blocks the steam from leaving (partially), while leaving it in at high temperatures could be detrimental due to the thermometer conducting away the heat, and giving the water a larger surface area to vent heat from. Please correct me if I'm wrong; I don't believe I'm proficient as some people that roam the vast (and mostly abandoned) plains of the scioly forums.
Does anyone know an efficient way to lower the temperature of water to around 0 C, so as to effectively run tests to determine how a thermodynamic device functions under ice water bonus?
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Re: Thermodynamics B/C

Post by Unome » February 3rd, 2018, 3:42 pm

JoeyC wrote:Does anyone know an efficient way to lower the temperature of water to around 0 C, so as to effectively run tests to determine how a thermodynamic device functions under ice water bonus?
There's a reason it's called the Ice Water Bonus. Well-mixed water with sufficient ice in it is theoretically exactly 0 C.
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Re: Thermodynamics B/C

Post by Justin72835 » February 4th, 2018, 9:19 pm

arv101 wrote:
connerywood18 wrote:One thing I have noticed in past tournaments is that several teams are allowed to leave their thermometers inside their device during the testing time. So I have a few questions:

1. Is this allowed? By the rule that states that the hole must remain unobstructed during testing time, I don't think so.

2. On the unlikely possibility it is allowed, is it a good idea?

3. If it is not allowed, should I stop people from doing it (is it a good idea) and if so how?

Thanks!
Honestly, at no competition have I seen this event run correctly. Which isn't entirely the supervisors' fault because this event is quite hard to run.
Relatable. One recurring issue I see is that supervisors are not able to consistently heat the water to the correct (stated) temperatures. While they are trying their best, it's kind of sketchy when you get your water and it's anywhere from 10 to 20 degrees lower than the temperature they initially stated. :|
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Re: Thermodynamics B/C

Post by Ashernoel » February 4th, 2018, 9:38 pm

At solon, Mason ran the event with large syringes to get the perfect volume of 75 ml (iirc) which is a pretty great idea. The test was the best test I've taken to date, in my opinion, especially considering we had 35 minutes to complete it (albeit I did not attend MIT this year).
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