*SPOILER FREE* Discussion Thread: Detective Conan Files 825-

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Chekhov MacGuffin
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by Chekhov MacGuffin »

sstimson wrote:Fixed - Before you tell me I got a mistake in converting 1kg in to X cubic meters of Gas, I already know and Am working on getting that corrected

Done - Need to figure out why 10kg of Dry Ice Sublimates in to 5.4 Cubic Meters of Gas. Maybe done but now new questions

1cc (Cubic Centimeter) of Dry Ice is 83.1837 Liters Of CO2 or 83183.7 cc (Cubic Centimeters) of CO2 and 0.0831837 CM (Cubic Meters)

So to find out how much gas comes from a X of Dry Ice, convert that to Cubic Centimeters of Dry Ice and Multiply by 0.0831837 to get Cubic Meters of Carbon Dioxide Gas

In the Biography under General Chemistry Online

This Site which sells Dry Ice Dry Ice for sell

First one on the list is these - High Density Dry Ice Pellets - 1/8" diameter dry ice pellets -Too small to move a body right?
Next one - Dry Ice Rice Pellets - 1/4" diameter dry ice pellets - Still too small, right?
Next one - Dry Ice Standard Pellets - 1/2" diameter dry ice pellets - About Ice cube size but still too small, right?
Next one - Cut Blocks of Dry Ice - ?"(2)? x 10" x 12" - This should be the one used

However the blocks are a little large to fit four on a tennis racket. After all the only area to lose some but not all of the friction from body weight is the area where the Dry Ice is, ever where else would have the normal friction.

The Volume would be if say the block is cut into 5 sections 2X10=20X12=240 Cubic Inches which is 3932.895 Cubic Centimeters Cubic In to cm's Next convert Cubic centimeters to grams from Here shows that 1 cc is about 1.5 grams so 3932.895 cc is 5899.34 grams or 5.89934 kilograms which would make 327.153 Cubic Meters of Gas based on an
How many grams of CO2 are in one cc of dry ice? The density of dry ice is about 1.5 g/mL, so 1 cc is about 1.5 g CO2.
How many moles of CO2 are in that number of grams? The molecular weight of CO2 is about 44 g/mol, so 1.5 g is

1.5 g CO2 × ( 1 mol CO244 g CO2 ) = 0.034091 mol CO2
What volume of gas contains that many moles of gas? Assume that the gas behaves ideally. At room pressure (about 1 atm) and temperature (about 25°C, or 298 K),

V = nRT/P
V = (0.034 mol × 0.0821 L atm mol-1 K-1 × 298 K)/(1 atm)
V = 8.3 × 10-1 L and that 1L = 0.001 Cubic meters
Which is where this comes from
Expansion ratio (relative increase in volume when evaporating to gas) for dry ice is 845
From Here Even if 100 cubic meters leaves the room under the door and another 100 cubic meters leave the room through cracks, that still leaves 127.153 cubic meters of Carbon Dioxide And remember this is only one square. Multiply that by four for the true volume of carbon dioxide sublimated. Also Remember as "quote - No sign of Dry Ice being used - unquote" 100% of that cube went into the air. As Conan would have been likely between 1 meter and 1 & 1/3 meters Using your room size air volume of that room is 1 meter X 4 Meters (12 Feet) X 5 Meters (15 feet) or 20 Cubic meters as anything above Conan's Head does not matter and Carbon Dioxide sinks. For fun lets say that the Co2 mixes evenly is the entire room thought to continue the easy conversion (3 feet is about 1 meter) instead of 8 feet make it 9 feet or 3 meters and that makes the room 60 cubic meters. Another Ad-Hoc. It seem to me to even have a enough Dry Ice after it was Bought and assuming the Dry ice was bought separately, then the Cake was allowed to melt out of the box overnight and the dry ice put inside. If the killer bought enough Dry Ice then even after the overnight period, there would still be enough Dry Ice to use. Another Ad-Hoc even though it does not appear in the Manga, also certain would be a picnic type cooler with the Dry ice wrapped in like a newspaper. This would greatly slow down the sublimation of the Dry Ice. Again going with you numbers even though we know that 100% of the Dry Ice sublimated. We get 327.153*.28=91.6028 m3 gas. You see you are forgetting a very important fact - Expansion ratio of the gas. A tight container like around 2kg releases a lot of gas. That should put it in the greater then .5 for the whole room. (More like over 100% for the whole room)
Chekhov MacGuffin wrote:
sstimson wrote:]

In summary 1) It sublimate fast meaning a simple ice cube size would be gone before they got out of the room.
2) The amount of gas released should have killed Conan.
3) If the gas is not kept in a certain type of container, it will sublimate and the vapor pressure will cause a small explosion. This would have been heard the night before.
1) This is simply wrong. You would know it was incorrect if you ever worked with dry ice. An icecube sized piece (let's call it one inch squared) can take minutes to sublimate even if you chuck it in hot water. It sublimates much slower in air.
2) Shown above
3) It would have to be an airtight, pressure resistant container for the ice to explode. Cake boxes are not airtight.
1) I am not going to completely disagree here. I only ask how long do you think the setup took. I would guess at best a low figure of ten minutes. You just said it can take minutes to sublimate an Ice Cube Sized Piece which I take to mean less then ten minutes meaning the Ice cube piece is gone just as she is closing the door.
2) Yes shown above. Remember you forgot the Expansion ratio.
3) Agreed. So if out on the counter all night yes you are right, but what about a freezer? Experiments show with time the Dry Ice continues to sublimates and again remembering the expansion ratio will because of vapor pressure force the freezer door open.

Biography

Google Math 555.783 * 845, 5.89934*845
University of York Dry Ice Solid Carbon Dioxide
General Chemistry Online What volume of gas is produced by vaporizing a given volume of dry ice?
Zomobo Videos Entry #2 04 - Dry Ice Rapid Sublimation
Continental Carbonic Purchase Dry Ice - Dry Ice for Sale
Yahoo Anwsers - How to convert Liter to cubic meter How to convert Liter to cubic meter[/spoiler]
Let's assume CO2 is an ideal gas, the temperature of the room is 300 °K (80.33 °F or 26.85 °C), and the pressure is 1 ATM (sea level) These are pretty reasonable for the conditions were are thinking about. If you use PV=nRT (R=8.205746*10-5 m3 atm K−1 mol−1, molar mass CO2 = 44.00964 g/mol) you will find 1 kg of dry ice will make about .56m3 of gas which will mix up in the air of the room (notice it is close to the .45m3 you quoted from Gas Safety UK Ltd). The figure you quoted, 5.89934 kilograms making 327.153 cubic meters of gas, would only happen like somewhere on Mars where the atmospheric pressure on the surface is like 100 times lower. A more accurate figure is 3.3m3. All of this means is that if you sublimated 5.9 kg dry ice completely, and then dumped the gas in the room, it would replace 3.3m3 of regular air.

5.9 kg is a lot of dry ice. No cake place gives out that much with a cake for 4. (Your online vender quoted ~$1 USD per pound so that's about $13 USD of dry ice right there, and an ice cream cake for 4 usually costs between 12 and 22 USD) You can see Gosho drew cute little cubes of dry ice in the box, which shows what he had in mind. Besides you have since moved to imaginary land by assuming the culprit went out and bought a massive chunk of dry ice anyway.
Akonyl wrote: I imagine that much like with normal ice, since the application of pressure creates heat, it would also sublimate at a somewhat faster rate and have a larger "cushion" of sublimated gas.
This is the case, along with the sublimation being faster at any surface contact points.
Akonyl wrote: as for the skin taking damage, I thought that as well, but then there's also the question of the dry ice being on the other side of the tennis racket mesh. I don't know exactly how much the separation would help him, but that might also reduce the amount of freezing on the body itself.
If a living person wore gym pants and sat on a racket on dry ice for a minute, they would definitely feel pain. This is a really tough call honestly. I'd have to try it out... (*Cue strange doctor story about patient who apparently plays tennis presenting with 4 burns with grid marks on butt*)
Last edited by Chekhov MacGuffin on May 13th, 2013, 5:28 pm, edited 1 time in total.
sstimson
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by sstimson »

Akonyl wrote:
Giogio wrote:
Chekhov MacGuffin wrote:
Giogio wrote: Hmm, to in my chemist's eyes that solution looks strange.

I think ice is slippery because it has a thin layer of melted water on it. Dry ice, though, turns directly into gas when "melting". It shouldn't be slippery enough to push a body around. Not without leaving scratches on the floor. Well, you could argue that the surface where it touches the floor will become relatively even, but still...
From personal experience, the gas that has sublimated from the warm contact points underneath creates pockets that act as cushions of air and allow sliding. It works better when the dry ice is already smooth. I never tried to apply that much weight to a dry ice cube though, so it could be difficult to slide and scraping might result. I'd have to try.

Bonus trivia: putting warm metal on dry ice makes a decent screaming sound.
Giogio wrote: Also, the frozen sports drink... Supercooled water is a cool idea, but you need a very clean bottle and distilled water for that. A sports drink won't work, I think.
http://www.youtube.com/watch?v=92dprVl5bl0
You can do it with beer too.
Wow, with beer? It had thought the solutes bring in enough crystal nuclei, but in this case I take everything back ^^

About the dry ice - of course it floats around on its own CO2 if it's just a light piece. But with a > 100kg guy sitting on four small pieces, I can't imagine it wouldn't touch the floor often enough to make some sort of scratches. Don't have any of it ready for testing it out, though.
However, there's a bigger contra: The guy's body had to be on dry ice for at least a minute. You can touch it for a very short period of time without taking damage, but after that time even with sports wear (which should be sorta thin), his skin must have frozen. Autopsy must have shown he has some spots of freezer burn on his butt, right?
Although I'm not sure how exactly Mohs hardness and Janka hardness measure up to each other, dry ice has a Mohs hardness of approx 2, on par with fingernails. So, the idea that it wouldn't scratch the floor when it has a bit of its own gas offsetting the weight isn't too far-fetched to me, especially if the floor was made with one of the harder woods. I imagine that much like with normal ice, since the application of pressure creates heat, it would also sublimate at a somewhat faster rate and have a larger "cushion" of sublimated gas.

as for the skin taking damage, I thought that as well, but then there's also the question of the dry ice being on the other side of the tennis racket mesh. I don't know exactly how much the separation would help him, but that might also reduce the amount of freezing on the body itself.
It was not scratching as much as Cracking. See Here

REMOVE FLOOR TILE
Dry Ice will loosen floor tile by freezing and slightly shrinking them allowing easier removal. The cold temperature of the Dry Ice will break the bond of the adhesive. Place the Dry Ice sheets centered on the tile to be removed and wait until it is completely frosted. If it has not popped off, slight tapping with a hammer or prying with a screwdriver will allow it to be lifted off easily. It is too time consuming to remove a whole floor, but is ideal for removing a few tiles that need replacing.
Also Here

COUNTERTOPS
Do not leave Dry Ice on a tiled or solid surface countertop as the extreme cold could crack it.
So cracking I would say is more likely then scratching.
Chekhov MacGuffin wrote:
sstimson wrote:
Spoiler:
Fixed - Before you tell me I got a mistake in converting 1kg in to X cubic meters of Gas, I already know and Am working on getting that corrected

Done -  Need to figure out why 10kg of Dry Ice Sublimates in to 5.4 Cubic Meters of Gas. Maybe done but now new questions

1cc (Cubic Centimeter)  of Dry Ice is 83.1837 Liters Of CO2 or 83183.7 cc (Cubic Centimeters) of CO2 and 0.0831837 CM (Cubic Meters)

So to find out how much gas comes from a X of Dry Ice, convert that to Cubic Centimeters of Dry Ice and Multiply by 0.0831837 to get Cubic Meters of Carbon Dioxide Gas

In the Biography under General Chemistry Online
Chekhov MacGuffin wrote:
sstimson wrote:
From Here
TRANSPORTING BY AUTO OR VAN
Plan to pick up the Dry Ice as close to the time it is needed as possible. If possible pack insulating items such as sleeping bags around the ice chest. This will stretch the time that the Dry Ice lasts. If it is transported inside a car or van (not in the trunk) for more than 10 minutes make sure there is fresh air. After 15 minutes with Dry Ice only in its paper bag in the passenger seat next to me, I started to breathe faster and faster as though I were running a race. I couldn't figure out why I was so out of breath until I saw the car air system was set in the re-circulated position, not fresh outside air.
As Carbon Dioxide is heavier than air it sinks. The room was air tight but for under the door.

Also this. From here
VENTILATION
Normal air is 78% Nitrogen, 21% Oxygen and only 0.035% Carbon Dioxide. If the concentration of carbon dioxide in the air rises above 0.5%, carbon dioxide can become dangerous. Smaller concentrations can cause quicker breathing, but is otherwise not harmful. If Dry Ice has been in a closed auto, van, room, or walk in for more than 10 minutes, open doors and allow adequate ventilation before entering. Leave area containing Dry Ice if you start to pant and breath quickly or your fingernails or lips start to turn blue. This is the sign that you have breathed in too much CO2 and not enough oxygen. Dry Ice CO2 is heavier than air and will accumulate in low spaces.
Note the word room. Conan was likely in that room for over two hours.
And Also this. From here

   1kg of dry ice will produce 0.45 m3 of gas (figure supplied by Gas Safety UK Ltd.).

   Dry ice to CO2 sublimation rate = approx. 1% of total mass per hour in an insulated container (figure supplied by Gas Safety UK Ltd. - source: Federal Aviation Administration in USA).

   Dry ice to CO2 sublimation rate = approx. 14% of total mass per hour at room temperature in the open (figure supplied by Gas Safety UK Ltd. - source: a study published in Aviation, Space and Environmental Medicine 1977).
Note that 0.45 m3  is equal to 15.8916 cubic feet. Please explain why Conan is still Alive.
The problem is that homes are not really air tight. Otherwise, if you shut your door to your room and stuffed a towel under it, you would die from oxygen deprivation. That's never happened in my experience of hating to get to sleep when I can see any light at all. Most houses have ventilation, especially for central heating in cold places. If putting dry ice in a closed door room really killed you in two hours, I honestly should be dead at this very moment. It's one thing to dump a bunch of carbon dioxide gas in a room at once, but in this case it's bleeding out over hours.

You can even use the numbers you provided to show why Conan didn't die.
The air conditioning had been on when Conan came in so assume the CO2 build up was negligible because of air circulation. Using the dead body as a measuring stick, the room is probably around 12' by 15' by 8' so, 1440 cubic feet, or 41 cubic meters. Although there should be less than a kg of dry ice in the container because the cake has been there since yesterday, and cake places don't like to give out that much dry ice, let's assume there is 1 kg anyway. If the dry ice is putting out ~28% of its mass in two hours (14% x 2hours) starting from a kg of dry ice (let's assume overkill here), that means 0.28 kg is getting dumped into the air over that time. 28% of 0.45 m3 is 0.126 m3 or about 0.3% of 41 cubic meters which is below your figure of 0.5%. Naturally this figure will be (probably a lot) lower because of air circulation out of the room, and more CO2 will collect near the floor rather than at bed level.
This Site which sells Dry Ice Dry Ice for sell

First one on the list is these - High Density Dry Ice Pellets - 1/8" diameter dry ice pellets -Too small to move a body right?
Next one                           - Dry Ice Rice Pellets              - 1/4" diameter dry ice pellets - Still too small, right?
Next one                           - Dry Ice Standard Pellets       - 1/2" diameter dry ice pellets - About Ice cube size but still too small, right?
Next one                           - Cut Blocks of Dry Ice           - ?"(2)? x 10" x 12"                - This should be the one used

However the blocks are a little large to fit four on a tennis racket. After all the only area to lose some but not all of the friction from body weight is the area where the Dry Ice is, ever where else would have the normal friction.

The Volume would be if say the block is cut into 5 sections 2X10=20X12=240 Cubic Inches which is 3932.895 Cubic Centimeters Cubic In to cm's Next convert Cubic centimeters to grams from Here shows that 1 cc is about 1.5 grams so 3932.895 cc is 5899.34 grams or 5.89934 kilograms which would make 327.153 Cubic Meters of Gas based on an
   How many grams of CO2 are in one cc of dry ice? The density of dry ice is about 1.5 g/mL, so 1 cc is about 1.5 g CO2.
   How many moles of CO2 are in that number of grams? The molecular weight of CO2 is about 44 g/mol, so 1.5 g is

   1.5 g CO2 × ( 1 mol CO244 g CO2 ) = 0.034091 mol CO2
   What volume of gas contains that many moles of gas? Assume that the gas behaves ideally. At room pressure (about 1 atm) and temperature (about 25°C, or 298 K),

   V = nRT/P
   V = (0.034 mol × 0.0821 L atm mol-1 K-1 × 298 K)/(1 atm)
   V = 8.3 × 10-1 L and that 1L = 0.001 Cubic meters
Which is where this comes from
Expansion ratio (relative increase in volume when evaporating to gas) for dry ice is 845
From Here Even if 100 cubic meters leaves the room under the door and another 100 cubic meters leave the room through cracks, that still leaves 127.153 cubic meters of Carbon Dioxide And remember this is only one square. Multiply that by four for the true volume of carbon dioxide sublimated. Also Remember as "quote - No sign of Dry Ice being used - unquote" 100% of that cube went into the air. As Conan would have been likely between 1 meter and 1 & 1/3 meters Using your room size air volume of that room is 1 meter X 4 Meters (12 Feet) X 5 Meters (15 feet) or 20 Cubic meters as anything above Conan's Head does not matter and Carbon Dioxide sinks. For fun lets say that the Co2 mixes evenly is the entire room thought to continue the easy conversion (3 feet is about 1 meter) instead of 8 feet make it 9 feet or 3 meters and that makes the room 60 cubic meters. Another Ad-Hoc. It seem to me to even have a enough Dry Ice after it was Bought and assuming the Dry ice was bought separately, then the Cake was allowed to melt out of the box overnight and the dry ice put inside. If the killer bought enough Dry Ice then even after the overnight period, there would still be enough Dry Ice to use. Another Ad-Hoc even though it does not appear in the Manga, also certain would be a picnic type cooler with the Dry ice wrapped in like a newspaper. This would greatly slow down the sublimation of the Dry Ice. Again going with you numbers even though we know that 100%  of the Dry Ice sublimated. We get 327.153*.28=91.6028 m3 gas. You see you are forgetting a very important fact - Expansion ratio of the gas. A tight container like around 2kg releases a lot of gas. That should put it in the greater then .5 for the whole room. (More like over 100% for the whole room)
Chekhov MacGuffin wrote:
sstimson wrote:
In summary 1) It sublimate fast meaning a simple ice cube size would be gone before they got out of the room.
                  2) The amount of gas released should have killed Conan.
                  3) If the gas is not kept in a certain type of container, it will sublimate and the vapor pressure will cause a small explosion. This would have been heard the night before.
1) This is simply wrong. You would know it was incorrect if you ever worked with dry ice. An icecube sized piece (let's call it one inch squared) can take minutes to sublimate even if you chuck it in hot water. It sublimates much slower in air.
2) Shown above
3) It would have to be an airtight, pressure resistant container for the ice to explode. Cake boxes are not airtight.
1) I am not going to completely disagree here. I only ask how long do you think the setup took. I would guess at best a low figure of ten minutes. You just said it can take minutes to sublimate an Ice Cube Sized Piece which I take to mean less then ten minutes meaning the Ice cube piece is gone just as she is closing the door.
2) Yes shown above. Remember you forgot the Expansion ratio.
3) Agreed. So if out on the counter all night yes you are right, but what about a freezer? Experiments show with time the Dry Ice continues to sublimates and again remembering the expansion ratio will because of vapor pressure force the freezer door open.

Biography

Google Math 555.783 * 845, 5.89934*845
University of York Dry Ice Solid Carbon Dioxide
General Chemistry Online What volume of gas is produced by vaporizing a given volume of dry ice?
Zomobo Videos Entry #2 04 - Dry Ice Rapid Sublimation
Continental Carbonic  Purchase Dry Ice - Dry Ice for Sale
Yahoo Anwsers - How to convert Liter to cubic meter How to convert Liter to cubic meter[/spoiler]
Let's assume CO2 is an ideal gas, the temperature of the room is 300 °K (80.33 °F or 26.85 °C), and the pressure is 1 ATM (sea level) These are pretty reasonable for the conditions were are thinking about. If you use PV=nRT (R=8.205746*10-5 m3 atm K−1 mol−1, molar mass CO2 = 44.00964 g/mol) you will find 1 kg of dry ice will make about .56m3 of gas which will mix up in the air of the room (notice it is close to the .45m3 you quoted from Gas Safety UK Ltd). The figure you quoted, 5.89934 kilograms making 327.153 cubic meters of gas, would only happen like somewhere on Mars where the atmospheric pressure on the surface is like 100 times lower. A more accurate figure is 3.3m3. All of this means is that if you sublimated 5.9 kg dry ice completely, and then dumped the gas in the room, it would replace 3.3m3 of regular air.

5.9 kg is a lot of dry ice. No cake place gives out that much with a cake for 4. (Your online vender quoted ~$1 USD per pound so that's about $13 USD of dry ice right there, and an ice cream cake for 4 usually costs between 12 and 22 USD) You can see Gosho drew cute little cubes of dry ice in the box, which shows what he had in mind. Besides you have since moved to imaginary land by assuming the culprit went out and bought a massive chunk of dry ice anyway.

[/quote]

Not going to question that. I am questioning if it is possible to both move and still have the ice to use to move say a 105 kg body. You would need to displace enough friction to move that body with likely a piece of twine or a thread (something that you can get under the door. Yes Gosho used Ice cubes and the way things are done means both are likely to be wrong (Dry ice cubes after 10 minutes and still enough to replace the friction & removing enough friction to move the body with either twine or a thread) My "imaginary land" Ice blocks would make both possible but would maybe kill Conan.

I am Basically saying that in the real world, you can not use just four Dry ice cube sized to do what he suggested. You in reality would need more like 16 cubes to move the body with either twine or a thread as friction will break it unless the area is frictionless. My blocks are large enough to remain usable and large enough to remove almost all friction, which I still claim can not be done with just a few dry ice cubes.
Last edited by sstimson on August 3rd, 2012, 4:59 pm, edited 1 time in total.
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by Chekhov MacGuffin »

Stuff slides like a charm on wooden tables and floors no less.

It's not like the culprit was trying to go tobogganing with it. She only had to move a fat guy's butt a foot and a half or so.
sstimson wrote: I am Basically saying that in the real world, you can not use just four Dry ice cube sized to do what he suggested. You in reality would need more like 16 cubes to move the body with either twine or a thread as friction will break it unless the area is frictionless. My blocks are large enough to remain usable and large enough to remove almost all friction, which I still claim can not be done with just a few dry ice cubes.
...Have you ever honestly even touched dry ice?
Last edited by Chekhov MacGuffin on August 3rd, 2012, 6:37 pm, edited 1 time in total.
sstimson
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by sstimson »

Chekhov MacGuffin wrote: Stuff slides like a charm on wooden tables and floors no less.

It's not like the culprit was trying to go tobogganing with it. She only had to move a fat guy's butt a foot and a half or so.
Bigger then an Ice Cube Size and No weight on top. Is the Center of mass in the Rump? What about the friction caused by the dragging hands and feet?
Last edited by sstimson on August 3rd, 2012, 6:30 pm, edited 1 time in total.
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by Akonyl »

sstimson wrote: It was not scratching as much as Cracking. See Here

REMOVE FLOOR TILE
Dry Ice will loosen floor tile by freezing and slightly shrinking them allowing easier removal. The cold temperature of the Dry Ice will break the bond of the adhesive. Place the Dry Ice sheets centered on the tile to be removed and wait until it is completely frosted. If it has not popped off, slight tapping with a hammer or prying with a screwdriver will allow it to be lifted off easily. It is too time consuming to remove a whole floor, but is ideal for removing a few tiles that need replacing.
Also Here

COUNTERTOPS
Do not leave Dry Ice on a tiled or solid surface countertop as the extreme cold could crack it.
So cracking I would say is more likely then scratching.
these are entirely different situations than what is in the file, though. Both of those situations hinge on the fact that the thing you want to remove is adhered via adhesive to something else, because it cracks the adhesive. Nowhere does it say that it is cracking the floor itself, it's just shrinking the floor ever so slightly so that the adhesive holding it to its foundation will snap under the forces. With hardwood floors, there's only a few nails per board, so any minimal shrinking caused by cooling would be localized to a very slight crack around the nail, at most. It's even possible that the floor in question is a nail-less floor, in which case there would be no damage at all.

The situations in that article also call for a full sheet of dry ice to be placed on the item and kept there, not just a short amount of time like was needed for the murder. Wood also grows and shrinks naturally, as opposed to the types of materials used for countertops and tiles, so if the dry ice was in fact there long enough to shrink the wood, I doubt there would be any noticeable effect at all.
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by Giogio »

Akonyl wrote: Although I'm not sure how exactly Mohs hardness and Janka hardness measure up to each other, dry ice has a Mohs hardness of approx 2, on par with fingernails. So, the idea that it wouldn't scratch the floor when it has a bit of its own gas offsetting the weight isn't too far-fetched to me, especially if the floor was made with one of the harder woods. I imagine that much like with normal ice, since the application of pressure creates heat, it would also sublimate at a somewhat faster rate and have a larger "cushion" of sublimated gas.

as for the skin taking damage, I thought that as well, but then there's also the question of the dry ice being on the other side of the tennis racket mesh. I don't know exactly how much the separation would help him, but that might also reduce the amount of freezing on the body itself.
Heh, havn't thought about the hardness.
The dry ice I know is always hard and sorta sticky on the surface, but that's just because it's so cold that it will condense + freeze water on most of its surface. You touch the water ice and most things get frozen to it, therefore the stickyness.
But if the dry ice was around at room temperature for some time, it should almost have its sublimation temperature on at least the whole surface, so that the water from the air can't even get near it against the gas flow, so I guess it stays soft-ish?
That way it might indeed work.
Can anybody just try it out? XD

Edit: As for the tennis racket protecting the skin: Given how fat he is, won't his butt just adapt to the form of the tennis racket and touch the dry ice anyway?
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by RanMouri82 »

yamiangie wrote: Just me or is Vermouth taking a lot of baths lately?  She read a some Douglas Adams essay and decide that all good judgement is done in the bath or something?

I'd say it's sad that Conan's blowing his cover again but well he really sucks had hiding that from anyone smart.  Heck he didn't even try to hide it from Kid.

wait when they say series they mean next case right.  Kaito's not cameoing in some new comic someone is doing?
LOL, I saw Vermouth and wondered when Aoyama was just going to show the woman full frontal. Geez, first it's lingerie, then bath towels, now a bathtub? Maybe it's a secret beauty regimen that makes a woman a woman.

Or Eisuke, who is probably dropping toast butter-side down in America as we type.

Right, series is a new case. Since the last case didn't work out so well for Kid....
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by Fennec »

Maybe the baths actually play a role in her youth somehow? Like she bathes in a secret fountain-of-youth potion? Who knows, it may be more plot-related than we think. xD
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aly_angelflight
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by aly_angelflight »

Fennec wrote: Maybe the baths actually play a role in her youth somehow? Like she bathes in a secret fountain-of-youth potion? Who knows, it may be more plot-related than we think. xD
I doubt DC will turn into Tuck Everlasting... :-X
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Re: *SPOILER FREE* Discussion Thread: Detective Conan Files

Post by D. »

Fennec wrote: Maybe the baths actually play a role in her youth somehow? Like she bathes in a secret fountain-of-youth potion? Who knows, it may be more plot-related than we think. xD
LOOOOOOL
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