Keep the Heat B/Thermodynamics C

Locked
awesome90220
Member
Member
Posts: 158
Joined: March 10th, 2012, 5:19 pm
Division: B
State: AL
Location: somewhere on this cruel, harsh planet
Has thanked: 0
Been thanked: 0

Re: Keep the Heat B/Thermodynamics C

Post by awesome90220 » February 24th, 2013, 3:09 pm

ychen428 wrote:Isn't there a maximum of 150mL for testing???
For division B, regionals is 100-200, in 25 mL increments, so they weren't allowed to do 170
2016 Season: BISOT/Reg/State/Nats
Wind Power:9/1/1/11
Experimental Design:5/1/1/16
It's About Time:-/1/1/20

sjwon3789
Member
Member
Posts: 107
Joined: December 31st, 2012, 3:45 pm
Division: C
State: VA
Location: Virginia
Has thanked: 0
Been thanked: 0

Re: Keep the Heat B/Thermodynamics C

Post by sjwon3789 » February 24th, 2013, 5:43 pm

So could anyone answer my question: Are cement glue considered as "expandable glue?"
I don't really understand when they say "expandable glue." Doesn't all glues expand?
2013 Events: Boomilever, Keep the Heat, WIDI
2014 Events: Boomilever, Geologic Mapping, Mission Possible, Scrambler
2015 Events: Air Trajectory, Bridge Building, Mission Possible

chalker
Member
Member
Posts: 2106
Joined: January 9th, 2009, 7:30 pm
Division: Grad
State: OH
Has thanked: 1 time
Been thanked: 52 times

Re: Keep the Heat B/Thermodynamics C

Post by chalker » February 24th, 2013, 6:41 pm

sjwon3789 wrote:So could anyone answer my question: Are cement glue considered as "expandable glue?"
I don't really understand when they say "expandable glue." Doesn't all glues expand?
Most glues don't expand by any noticable amount (and in fact a lot actually shrink as they harden).

Student Alumni
National Event Supervisor
National Physical Sciences Rules Committee Chair

sjwon3789
Member
Member
Posts: 107
Joined: December 31st, 2012, 3:45 pm
Division: C
State: VA
Location: Virginia
Has thanked: 0
Been thanked: 0

Re: Keep the Heat B/Thermodynamics C

Post by sjwon3789 » February 25th, 2013, 12:16 pm

What about some glue that doesn't change size (solid)? It looks like it's expandable since it's solid but it's actually not...
2013 Events: Boomilever, Keep the Heat, WIDI
2014 Events: Boomilever, Geologic Mapping, Mission Possible, Scrambler
2015 Events: Air Trajectory, Bridge Building, Mission Possible

User avatar
harryk
Exalted Member
Exalted Member
Posts: 268
Joined: March 17th, 2010, 12:28 pm
Division: Grad
State: TX
Location: C-Dub (CyWoods)
Has thanked: 0
Been thanked: 0

Re: Keep the Heat B/Thermodynamics C

Post by harryk » February 25th, 2013, 12:47 pm

sjwon3789 wrote:So could anyone answer my question: Are cement glue considered as "expandable glue?"
I don't really understand when they say "expandable glue." Doesn't all glues expand?
sjwon3789 wrote:What about some glue that doesn't change size (solid)? It looks like it's expandable since it's solid but it's actually not...
Expandable glue is considered to be glues that greatly increase in volume when hardening, often turning into a hard foam. The most well known type of expanding glue is Gorilla Glue, if you've ever used it you'll know why. So if your glue doesn't do that, than you should be fine.

As for cement, real cement glue consists of a solvent often containing dissolved material of whatever the glue is meant for(ex. ABS cement will have dissolved ABS in a bottle of solvent). Cements work by actually chemically melting the surface and then in essence welding the two pieces together. Unfortunately many glues are called cement that aren't really cement.
Colorado School of Mines
"Yes, he likes that; Alfie! Though personally he prefers to be called Stormaggedon, Dark Lord of All" - The Doctor, Closing Time

awesome90220
Member
Member
Posts: 158
Joined: March 10th, 2012, 5:19 pm
Division: B
State: AL
Location: somewhere on this cruel, harsh planet
Has thanked: 0
Been thanked: 0

Re: Keep the Heat B/Thermodynamics C

Post by awesome90220 » February 25th, 2013, 4:57 pm

harryk wrote:
sjwon3789 wrote:So could anyone answer my question: Are cement glue considered as "expandable glue?"
I don't really understand when they say "expandable glue." Doesn't all glues expand?
sjwon3789 wrote:What about some glue that doesn't change size (solid)? It looks like it's expandable since it's solid but it's actually not...
Expandable glue is considered to be glues that greatly increase in volume when hardening, often turning into a hard foam. The most well known type of expanding glue is Gorilla Glue, if you've ever used it you'll know why. So if your glue doesn't do that, than you should be fine.

As for cement, real cement glue consists of a solvent often containing dissolved material of whatever the glue is meant for(ex. ABS cement will have dissolved ABS in a bottle of solvent). Cements work by actually chemically melting the surface and then in essence welding the two pieces together. Unfortunately many glues are called cement that aren't really cement.
Is there any type of list for expandable glues?
2016 Season: BISOT/Reg/State/Nats
Wind Power:9/1/1/11
Experimental Design:5/1/1/16
It's About Time:-/1/1/20

User avatar
harryk
Exalted Member
Exalted Member
Posts: 268
Joined: March 17th, 2010, 12:28 pm
Division: Grad
State: TX
Location: C-Dub (CyWoods)
Has thanked: 0
Been thanked: 0

Re: Keep the Heat B/Thermodynamics C

Post by harryk » February 25th, 2013, 5:14 pm

awesome90220 wrote:
harryk wrote:
sjwon3789 wrote:So could anyone answer my question: Are cement glue considered as "expandable glue?"
I don't really understand when they say "expandable glue." Doesn't all glues expand?
sjwon3789 wrote:What about some glue that doesn't change size (solid)? It looks like it's expandable since it's solid but it's actually not...
Expandable glue is considered to be glues that greatly increase in volume when hardening, often turning into a hard foam. The most well known type of expanding glue is Gorilla Glue, if you've ever used it you'll know why. So if your glue doesn't do that, than you should be fine.

As for cement, real cement glue consists of a solvent often containing dissolved material of whatever the glue is meant for(ex. ABS cement will have dissolved ABS in a bottle of solvent). Cements work by actually chemically melting the surface and then in essence welding the two pieces together. Unfortunately many glues are called cement that aren't really cement.
Is there any type of list for expandable glues?
You could search google for a list, but since the number of different glues is so great(practically infinite), you're unlikely to find a useful list. It should just be common sense to identify an expanding glue. Let a test sample harden and if it grew in volume and is now full of air bubbles, it is an expandable glue. If it didn't, then its not.
Colorado School of Mines
"Yes, he likes that; Alfie! Though personally he prefers to be called Stormaggedon, Dark Lord of All" - The Doctor, Closing Time

sjwon3789
Member
Member
Posts: 107
Joined: December 31st, 2012, 3:45 pm
Division: C
State: VA
Location: Virginia
Has thanked: 0
Been thanked: 0

Re: Keep the Heat B/Thermodynamics C

Post by sjwon3789 » February 26th, 2013, 4:09 pm

Also, do we need to take out our beaker? Like, my beaker is attached to this insulators (not transparent)...?
2013 Events: Boomilever, Keep the Heat, WIDI
2014 Events: Boomilever, Geologic Mapping, Mission Possible, Scrambler
2015 Events: Air Trajectory, Bridge Building, Mission Possible

awesome90220
Member
Member
Posts: 158
Joined: March 10th, 2012, 5:19 pm
Division: B
State: AL
Location: somewhere on this cruel, harsh planet
Has thanked: 0
Been thanked: 0

Re: Keep the Heat B/Thermodynamics C

Post by awesome90220 » February 26th, 2013, 4:25 pm

sjwon3789 wrote:Also, do we need to take out our beaker? Like, my beaker is attached to this insulators (not transparent)...?
In the two competitions, I have had so far, I would have to say, YUP
2016 Season: BISOT/Reg/State/Nats
Wind Power:9/1/1/11
Experimental Design:5/1/1/16
It's About Time:-/1/1/20

135scioly
Member
Member
Posts: 315
Joined: February 13th, 2012, 9:04 am
Division: C
State: MO
Has thanked: 0
Been thanked: 0

Re: Keep the Heat B/Thermodynamics C

Post by 135scioly » February 26th, 2013, 4:26 pm

So you mean your internal beaker can't come out of your insulating device? I would think that might be difficult to fill up with hot water, and they might want to make sure it really is a 250 ml beaker for impound. So I'm guessing no....?
2014 Events: Entomology, Astronomy, Disease Detectives

Locked

Return to “2013 Lab Events”

Who is online

Users browsing this forum: No registered users and 1 guest