The walls of an ice chest are made of 2.00 cm thick styrofoam with a thermal conductivity 0.0300 W/mK.
The total surface area of the ice chest is 1.20 m2. If 4.00 kg of ice at 0.00C are placed in the chest and the temperature outside the chest is 20.0C, how long does it take the ice to melt? Remember that the latent heat of fusion of water is 79.6 cal/g.
A)
4.22 hours
B)
22.1 hours
C)
17.6 hours
D)
1.33 days
E)
10.3 hours
Question 2
Consider a capacitor connected across the ac supply. The current through the capacitor will ________ as the capacitance is increased.
A)
increase
B)
remain constant
C)
decrease
Chest Configurations, Normal Adult, Barrel Chest, Pectus Carinatum, Pectus Excavatum
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