1. Consider the conditions of Example 3.12, except that the person is now exercising (in the air environment), which increases the metabolic heat generation rate by a factor of 8, to 5600 W/m3. At what rate would the person have to perspire (in liters/s) to maintain the same skin temperature as in that example?
2. Consider the conditions of Example 3.12 for an air environment, except now the air and surroundings temperatures are both 15°C. Humans respond to cold by shivering, which increases the metabolic heat generation rate. What would the metabolic heat gener- ation rate (per unit volume) have to be to maintain a comfortable skin temperature of 33°C under these con- ditions?