Oblio
Fish Herder
Absolutely.I would imagine it varies with the medium, correct?
Air, water, different solid masses, etc....
Air is a poor conductor of heat (this is why clothing etc keeps us warm). Water is better, which is why you can get hypothermia is relatively warm water (but below body temp). Metals usually are very good heat conductors - Silver, Copper, Steel, Cast Iron (High to low conductivity), Cast Iron is relatively poor which is why it takes so long to heat up evenly. Vacuum conductivity is zero, which is why a Thermos keeps things hot or cold so well.