Please help! If you could explain it, I\'d really appreciate it! 3 kg of ice and

Question

Please help! If you could explain it, I'd really appreciate it!

3 kg of ice and a 12-pack of ice-cold soda are placed in a 25" times 25" times 40" (outside dimensions) Styrofoam TM cooler with 1" thick sides. How long will its contents remain at 0 degree C if the outside is a sweltering 35degree C ? Assume no condensation forms on the outside of the cooler. Ignore the effects of convection and conduction of the air inside. Part of what helps some plants support themselves is the turgidity (the high internal pressure) of their cells. How is that related to anything that we talked about in DL today and what happens to these plants when there is not enough water available in the ground?

Explanation / Answer

question (5.3-2):

m Lf = t K (dT) (2(A1/L) + 2(A2/L) + 2(A3/L))

3 * (3.33e5) = t * 0.03 * (35 - 0) * (2*(25*25/1) + 2*(25*40/1) + 2*(25*40/1)) * 0.0254

==> t = 7135 seconds

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