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Is there a word for how quickly a substance gets hot or gets cold? (Original Post) raccoon Jul 2019 OP
Conductivity? LakeArenal Jul 2019 #1
Halfway there-- it's thermal conductivity. TreasonousBastard Jul 2019 #2
I think youve got it. raccoon Jul 2019 #5
Thermal resistance (or resistivity) is used as well, and... KY_EnviroGuy Jul 2019 #11
You explained it very well. n/t customerserviceguy Jul 2019 #12
Try almond milk jberryhill Jul 2019 #16
Thanks, JB. Will try. KY_EnviroGuy Jul 2019 #21
Space Shuttle Thermal Tile Demonstration hunter Jul 2019 #19
Wow! Thanks for that. KY_EnviroGuy Jul 2019 #20
Thermal conductivity Clash City Rocker Jul 2019 #3
"Heat capacity" might be what you are looking for... RockRaven Jul 2019 #4
It depends on what you mean jberryhill Jul 2019 #6
My ex had high thermal conductivity ProudLib72 Jul 2019 #14
meh jberryhill Jul 2019 #15
Zero Kelvin is a hell of a thing to try and sleep next to ProudLib72 Jul 2019 #17
Absolutely! jberryhill Jul 2019 #18
Thank you, everybody, for your helpful responses! nt raccoon Jul 2019 #7
foreplay? dameatball Jul 2019 #8
! Kali Jul 2019 #9
OK! Dave in VA Jul 2019 #10
Too funny! n/t customerserviceguy Jul 2019 #13

raccoon

(31,111 posts)
5. I think youve got it.
Fri Jul 12, 2019, 06:44 PM
Jul 2019
What is meant by high thermal conductivity?

Thermal conductivity refers to the amount/speed of heat transmitted through a material. Heat transfer occurs at a higher rate across materials of high thermal conductivity than those of low thermal conductivity.

KY_EnviroGuy

(14,491 posts)
11. Thermal resistance (or resistivity) is used as well, and...
Fri Jul 12, 2019, 09:27 PM
Jul 2019

it's the inverse of thermal conductivity. "Thermal resistance" is very commonly used in electronics.

Good examples for demonstrating how these terms are used would be if you heated one end of a ceramic rod (which has high thermal resistance but low conductivity), it might take an extremely long time to feel heat at the opposite end. However, doing the same with a copper rod (which has low thermal resistance but high conductivity), you will feel heat at the opposite end quickly.

In terms of science, a valid answer to your question is quite complex because it depends on how the heat is applied (conduction, convection or radiation), the mass of the object being heated, whether the object is liquid, solid or gas along with some other properties of the substance.

It's been around 50-years since I studied thermodynamics so about all I know now is a little basic practice like boiling water for oatmeal....

KY_EnviroGuy

(14,491 posts)
21. Thanks, JB. Will try.
Sat Jul 13, 2019, 01:44 PM
Jul 2019

Also love hot oat bran cereal and almond milk sounds good mixed in with it, too.......

 

jberryhill

(62,444 posts)
6. It depends on what you mean
Fri Jul 12, 2019, 06:46 PM
Jul 2019

Heat capacity and specific heat are equilibrium properties that don’t tell you “how fast” an object becomes hot or cold, but tells you how much energy must be added or removed to effect a change of temperature.

Thermal conductivity tells you how fast you can add or remove heat to it.

But, in general, neither of those things is relevant to how hot or cold something feels. The perception of temperature by, say, your hand, is a complex physical and biological process.

What do you really want to know?
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