No such thing as "cold"

[Scott]

There is no such thing as "cold"!

Just lack of heat. Cold is what you feel when you do not have enough heat molecules. Therefore I can legally say that there is no such thing as "cold".

So the next time you "feel" cold, just say "I'm lacking heat molecules".

Anyone have any comments?

[kevblah]

Well instead of saying you have a cold, you could say you have a "lack of heat energy". Or LOHE, pronounced "low". " What's going on, are you sick? Yeah you have a 'low'." Well we are so used to calling it cold that we will probably keep the name. But that is interesting, how the universe works like that. What if it had been made the other way around, with some kind of "cold energy", you know, where energy made things colder? That would be weird.... like for instance, if you want to freeze something you need to make a "cold fire", making popsicles over a campfire or something.

[Darren ea 2K7]

I strongly agree with him because im doing about it in school in my science lesson so yes this is wright .

[Lorddy2005]

i would say that lack of heat energy isn't heat energy but a lack of active molecules as it is molecules movement that creates the heat, i believe tissue respiration is scientific terminology for it.

[kevblah]

Yes what is often called heat energy is actually the vibration of the molecules inside of what you are measuring. The more that the molecules are vibrating inside, the higher the temperature is measured as, the more "heat" that is there. That is why when two cool objects are rubbed against each other you get some heat. The friction of the two objects makes the molecules vibrate as they are held in place in the object but they have energy coming from the friction force trying to slow the object. They vibrate faster and faster as they undergo friction and they build up in vibration so the object gets hotter.

[Scott]

Anyone know if they still air "Bill Nye The Science Guy"?

I remember about the moving thing now, but I also remeber something about cold objects stealing heat away from hot/warm object when they ttouch.

[kevblah]

Im not sure if they still air Bill Nye the Science Guy, but that was a cool show. Yeah I think one way it makes sense is if you have two springs side by side, which is each molecules jiggling in its spot, and one isnt jiggling as much, that one is cold. The one that is jiggling will bump the not jiggling one and make it jiggle more so it heats up. But the hotter one gave away some of its jiggling so it is cooler now. In the same way, objects that touch are always moving heat from the hotter one to the cooler one, until their temperatures are equal. But other forces are making new heat out of other types of energy, such as electric or nuclear energy turning into heat, so that we do have new heat entering and also leaving the system. So the temperatures are never all the same. The type of heat transfer of molecules with different temperatures bumping each other object to object is called convection.


As you can see on this image, this image is copyright of www.gcse.com . It is from this page www.gcse.com/energy/conduction.htm explaining conduction in non-metals, although I believe the rules of conduction are the same in metals.

[Scott]

thanks Kevin, that makes things a lot more clear.

[Arcanus]

They say if you hold a piece of ice it doesn't transfer it's coldness to you it just takes the heat away, and by absorbing the heat from your body, melts! But to be technical there IS such a thing as "cold" because that is what it is called Cold is a describing word like the crayon is BLACK..the towel is WET..and your hands are COLD. So if you lack heat molecules, it would mean you weren't as hot..so in order to describe not as hot or warm it's cold. A cold as in the flu or being sick..i don't think has anything to do with it. You might have the "cold" chills or something.

PS scott remember our HUGE fight over bill Nye the science guy when we were kids? lol

[Scott]

yeah, and I even remember what I wanted to test out too! The turning bones into rubber thing.

btw, you still have your rock?