(II) Heat conduction to skin. Suppose 150 W of heat flows byconduction from the blood capillaries beneath the skin tothe body’s surface area of 1.5 m2 If the temperature difference is 0.50 C°, estimate the average distance of capillaries below the skin surface.

(II) A tire is filled with air at 15°C to a gauge pressure of230 kPa. If the tire reaches a temperature of 38°C, whatfraction of the original air must be removed if the originalpressure of 230 kPa is to be maintained?

(I) (a) “Room temperature” is often taken to be 68°F. Whatis this on the Celsius scale? (b) The temperature of the filament in a lightbulb is about 1900°C. What is this on the Fahrenheit scale?

Occasionally, huge icebergs are found floating on the ocean’s currents. Suppose one such iceberg has a regular volume and is 120 km long, 35 km wide, and 230 m thick. (i)    How much heat would be required to melt this iceberg (assumed to be at 0°C) into liquid water at 0°C? (The density of ice is 917 kg/m3. The latent heat of fusion for ice is 33.5 x 104 J/kg.) (ii)   Assume the average annual energy consumption by a developed country in the past years was 9.3 x 1019 J. If this energy were delivered to the iceberg every year, how many years would it take before the ice is completely melted? (iii)  What will be the outcome(s) and possible implication(s) in (ii) if the time rate of the changes in average annual energy consumption is a positive number?

. (III) Air that is at its dew point of 5°C is drawn into abuilding where it is heated to 22°C. What will be the relativehumidity at this temperature? Assume constant pressureof 1.0 atm. Take into account the expansion of the air.

(II) The heat capacity, C, of an object is defined as the amount of heat needed to raise its temperature by 1 C°. Thus, to raise the temperature by AT requires heat Q given by Q = CAT. (a) Write the heat capacity C in terms of the specific heat, c, of the material. (b) What is the heat capacity of 1.0 kg of water? (c) Of 45 kg of water?

(II) It is observed that 55.50 mL of water at 20°C completelyfills a container to the brim. When the container and thewater are heated to 60°C, 0.35 g of water is lost. (a) Whatis the coefficient of volume expansion of the container?(b) What is the most likely material of the container?Density of water at 60°C is 0.98324 g/mL

(I) Among the highest and lowest natural air temperatures claimed are 136°F in the Libyan desert and –129°F in Antarctica. What are these temperatures on the Celsius scale?

(III) Approximately how long should it take 8.2 kg of ice at 0°C to melt when it is placed in a carefully sealed Styrofoam ice chest of dimensions 25cmx 35cm x55 cm whose walls are 1.5 cm thick? Assume that the conductivity of Styrofoam is double that of air and that the outside temperature is 34°C.