Consider two different construction materials with the following R values: R = 2R and R = R. If the cross-sectional area of each material and the temperature difference across them is the same, how thick would material 2 have to be, such that the rate of heat flow through each material is equal, if the thickness of material 1 is L? O L O All three bricks weigh the same. O L2 O L/4 O 2L

A Styrofoam ice box has a total area of 0.950 m^2 and walls with an average thickness of 2.50 cm. The box contains ice, water, and canned beverages at 0 oC . The inside of the box is kept cold by melting ice. What is total amount of heat required to melt ice in one day if the ice box is kept in the trunk of a car at 35.0oC ?

The initial temperature of 150 g of ice is -20°C. The spe-cific heat capacity of ice is 0.5 cal/g.C° and water's is1 cal/g•C°. The latent heat of fusion of water is 80 cal/g.a.How much heat is required to raisethe ice to 0°C andcompletely melt the ice?b. How much additional heat is required to heat the water(obtained by melting the ice) to 25°C?C.What is the total heat that must be added to convert the80 g of ice at-20°C to water at +25°C?d. Can we find this total heat simply by computing howmuch heat is required to melt the ice and adding theamount of heat required to raise the temperature of 80 gof water by 45°C? Explain

0.4 kg water is at room temperature 23 degrees in an aluminum container. An unknown metal with 0.5 kg mass is placed inside the water raising its temperature to 40 degrees. A)What is the specific heat of the unknown metal. B) Would the equilibrium temperature greater, less or the same if the system was not properly isolated.