each part of the following question: a) A raft is constructed of wood having a density of 600kg/m3. Its surface area is 5.7m2 and its volume is 0.60m3. When the raft is placed in fresh water of density 1000 kg/m3, to what depth does the raft sink in the water? b) Calculate the mass flow rate (in g/s) of blood (r=1.0g/cm3) in an aorta with a cross-sectional area of 2.0 cm2 if the flow speed is 40 cm/s. c) The approximate inside diameter of the aorta is 0.50cm; that of a capillary is 10mm. The approximate average flow speed is 1.0 m/s in the aorta and 1.0 cm/s in the capillaries. If all the blood in the aorta eventually flows through the capillaries , estimate the number of capillaries. d) A specimen of urea dissolved in water has a volume of 100 cm3 and a mass of 133g. What is the density of the solution