Strange Question About the Cold

Jiffyman · 10-25-2005, 07:39 PM

No I'm not talking about the common cold what I'm talking about is the oppisite of warmth. I was reading not to long ago in my science book and it says that warmth is a form of infrared radiation. Now what I'm wondering is if warmth is ifrared radiation what is cold nothing, is it just there, is it another form of radiation.

Verve · 10-25-2005, 07:48 PM

Heat means that molecules are moving more rapidly than us, so we feel warm. basically, "more motion= more friction= heat'

Cold means they are moving slower than us so "less motion= less friction= less heat"

If something is hot or cold, we can only judge that by its relation to our body temperature.

cell4me · 10-25-2005, 07:52 PM

Warmth is caused by any heat source such as fire, friction ect ect! It does not have to be infrared radiation. How ever the earth is heated by the sun which in fact is infrared radiation and cold is caused by lack of heat source, such as the earth in the winter that is closer to the sun but it's the angle at which sunlight strikes the earth at noon each day that determines how much of the sun's energy we feel!

Trizoy · 10-25-2005, 08:06 PM

Quote:

Originally Posted by cell4me

Warmth is caused by any heat source such as fire, friction ect ect, it does not have to be infrared radiation, how ever the earth is heated by the sun which in fact is infrared radiation and cold is caused by lack of heat source such as the earth in the winter is closer to the sun but it's the angle at which sunlight strikes the earth at noon each day that determines how much of the sun's energy we feel!

Would have been a better description if you had punctuated it correctly.

cell4me · 10-25-2005, 08:12 PM

Quote:

Originally Posted by Trizoy

Would have been a better description if you had punctuated it correctly.

I can change it if it bothers you that much

There I changed it for you. English was not my best subject science was!

**SFR** · 10-25-2005, 08:23 PM

..you forgot the comma...

Quote:

Originally Posted by cell4me

English was not my best subject, science was!

skidude · 10-25-2005, 09:52 PM

The thing is, why would anyone want to develop a system to track cold things. The military uses infared to identify enemy missiles, aircraft, etc. There is absolutely no reason to even have something exist which can track cold things since, well, there really isn't any (military or self defense speaking) threat from cold things. Missiles flying through the air generate heat from their engines, which propel them. It would most likely be impossible to make a "cold" missile since the only (logical) way to create thrust to propel the missile would be a series of explosions from the engine.

In the case of aircraft, the moving parts in the engines which, as already stated, creates heat since there is moving parts which generate friction. To create a "heatless" plane is virtually impossible since to make an engine, you need moving parts and gears to spin the turbine, thus creating air resistance, which propels the plane forward. Without those moving parts there is no air resistance, which means that to create a plane without a motor is like saying that you want to make a computer without a processor. Impossible.

cell4me · 10-25-2005, 10:17 PM

Quote:

Originally Posted by skidude

The thing is, why would anyone want to develop a system to track cold things.

Perqua???? Who said anything about this? Or do you just make stuff up as you read...roflmao!

No one said anything about tracking cold things, ya must have read that in another thread

skidude · 10-25-2005, 10:22 PM

Quote:

Originally Posted by cell4me

Perqua???? Who said anything about this? Or do you just make stuff up as you read...roflmao!

No one said anything about tracking cold things, ya must have read that in another thread

Dunno prbly, I'm in like 10 forums... anyway...

spacedude89 · 10-25-2005, 10:24 PM

well, what if you want to track icebergs!

10-25-2005, 07:39 PM	#1 (permalink)
Jiffyman Platinum Member Join Date: Dec 2004 Location: USA Age: 17 Posts: 678	Strange Question About the Cold No I'm not talking about the common cold what I'm talking about is the oppisite of warmth. I was reading not to long ago in my science book and it says that warmth is a form of infrared radiation. Now what I'm wondering is if warmth is ifrared radiation what is cold nothing, is it just there, is it another form of radiation. __________________ Mother board: Gigabyte S-series GA-MA69GM-S2H Additional Specs Down There: http://www.gigabyte.co.nz/Products/M...ProductID=2579 Processor: AMD A64 X2 4200+ Dual-Core RAM: 2gig DDR2 800mhz

10-25-2005, 07:52 PM	#3 (permalink)
cell4me banned Join Date: Feb 2005 Posts: 1,486	Warmth is caused by any heat source such as fire, friction ect ect! It does not have to be infrared radiation. How ever the earth is heated by the sun which in fact is infrared radiation and cold is caused by lack of heat source, such as the earth in the winter that is closer to the sun but it's the angle at which sunlight strikes the earth at noon each day that determines how much of the sun's energy we feel! Last edited by cell4me; 10-25-2005 at 08:14 PM.

10-25-2005, 09:52 PM	#7 (permalink)
skidude Diamond Member Join Date: Aug 2005 Location: Orono, Maine Age: 18 Posts: 4,870	The thing is, why would anyone want to develop a system to track cold things. The military uses infared to identify enemy missiles, aircraft, etc. There is absolutely no reason to even have something exist which can track cold things since, well, there really isn't any (military or self defense speaking) threat from cold things. Missiles flying through the air generate heat from their engines, which propel them. It would most likely be impossible to make a "cold" missile since the only (logical) way to create thrust to propel the missile would be a series of explosions from the engine. In the case of aircraft, the moving parts in the engines which, as already stated, creates heat since there is moving parts which generate friction. To create a "heatless" plane is virtually impossible since to make an engine, you need moving parts and gears to spin the turbine, thus creating air resistance, which propels the plane forward. Without those moving parts there is no air resistance, which means that to create a plane without a motor is like saying that you want to make a computer without a processor. Impossible. __________________ Desktop / Laptop CPU- AMD Athlon X2 6000+ 3.0 GHz / Intel Core 2 Quad Q9550 2.8 GHz Video- ATI X1900XTX / 2x 8800M GTX SLI Memory- 2 GB A-Data DDR2800 / 4GB DDR2800 Hard Drives- 3x 160GB 7200RPM / 2x 320GB 5400RPM (RAID 0) Mobo- Gigabyte GA-M61P-S3 Socket AM2 Motherboard / Sager NP9262 "In These Lowly Halls / No Moon Will Beam, No Sun Will Shine / In These Narrow Rooms / No Tears Are Seen, No Laughter Heard" --- Insomnium ---

10-25-2005, 10:24 PM	#10 (permalink)
spacedude89 Diamond Member Join Date: Mar 2005 Location: Oregon Age: 19 Posts: 1,419	well, what if you want to track icebergs! __________________ Desktop: Abit AW9D-MAX ~ Core 2 Duo E6300 @ 2.4GHz ~ Radeon X1900GT Laptop: HP ~ Core Duo T2050 ~ nVidia 7600 First smiles, then lies. Last comes gunfire.

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10-25-2005, 07:48 PM	#2 (permalink)
Verve Diamond Member Join Date: Sep 2005 Location: Tampa Bay, Florida Age: 18 Posts: 2,494	Heat means that molecules are moving more rapidly than us, so we feel warm. basically, "more motion= more friction= heat' Cold means they are moving slower than us so "less motion= less friction= less heat" If something is hot or cold, we can only judge that by its relation to our body temperature.