If you wish to cool a warm can of fruit salad by quickly putting it in the fridge, would you leave the paper wrapper on or remove it? Assume that the conductivity of the wrapper is much smaller than that of the can.
2006-12-11 09:22:39 · 4 answers · asked by lindsey_6_3 2 in Science & Mathematics ➔ Physics
You would remove it. Having the can in contact with other already cold objects, metal objects especially, would help too since that would get around the low thermal conductivity of the air.
2006-12-11 09:28:22 · answer #1 · answered by John's Secret Identity™ 6 · 0⤊ 0⤋
Removing the wrapper would definitely speed up the heatflow out of the can. However I am lazy and i would wait iso of removing the wrapper.
2006-12-11 17:32:12 · answer #2 · answered by Indori 2 · 0⤊ 0⤋
Remove the paper - the paper conductivity is very small, but the air it traps between it and the can is very high. In fact air is one of the most efficient resistance of heat transfer. It's not the insulation that gives good protection, its the air space it traps. In face, ice is one of the best insulators there is.
2006-12-11 17:33:11 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I wouldn't take the time & trouble to remove the paper. If this is a real emergency, I would open the can & pour contents into an aluminum pie tin, then quickly put in frig.
2006-12-11 17:53:18 · answer #4 · answered by buffalobillpatrick 1 · 0⤊ 0⤋