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re: how it was in the old time of ice-box to keep the ice in the...?
25 oct 1997
gfost wrote:
>ice has the lowest thermal conductivity of all materials that i know of.
perhaps you only know of copper (385 w/mc), aluminum (211) and steel (47.6),
vs ice (2.26), concrete (1.73), glass (1.05), water (0.596), plaster (0.17),
oak (0.16), pine (0.138), cork (0.04), expanded polystyrene (0.034),
air (0.026), polyurethane foam (0.025), or silica aerogel (0.004).
water's specific heat is about 4 kj/kgc, vs ice with 2 and air with 1.
nick
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