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{"ops":[{"insert":"A completely sealed container, in the shape of a cube with side panels of length = 0.71 m, is full of carbonic ice at temperature -109.5 \u00b0C and placed in a room where the ambient temperature is 28.7 \u00b0C.\u00a0The thickness of each (identical) panel of the container is 2.2 cm.\u00a0In 1.2 day(s), an amount of 3073661 J of heat is conducted through the panels.\u00a0Find the thermal conductivity of the material which the panels are made of.\n\nSolar panels on one of the NWU solar car prototype, have an emissivity of e = 0.623.\u00a0When in direct sunlight, they absorb energy at a rate of 1030 J\/s per square meter of surface.\u00a0Assume that the only energy loss is due to the emission of radiation.\u00a0What equilibrium temperature are the panels reaching?\n\nIn a closed, insulated system, the vapour pressure of water at 15.16 \u00b0C is 4720 Pa. What percentage of the standard atmospheric pressure (1 atm) is this?\n\n\n"}]}
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