locust27

#1 During heavy exercise 2.0 liters of blood are pumped to the surface of a person per minute to carry away core heat. If the blood is cooled by 3.0°C at the surface, what is the rate of heat transfer in watts due to blood flow (force convection) . You may assume that the specific heat of blood is the same as that for water and that the density of blood is 1.05g/cm3. Note that although the core and skin normally differ in temperature by 3°-4°C, the blood will not be cooled by that much . Skin temperature will rise during exercise and the blood must have a greater temperature than the skin in order to transfer heat to it through vessel walls (conduction). Please provide formulas used and step by step solution. #2 A given pressure difference produces a flow rate of 4 liters/min through one tube and 3.0 liters/min through another tube. What would the flow rate be if these tubes were hooked together so that the fluid has to flow through them sequentially? The pressure difference remains the same.