The carotid artery (blood vessel) supplies blood to the brain, with a diameter and length of 8 mm and l.5 m, respectively. assume that for a normal person, about 3.6 ml of blood is pumped for every heartbeat, heart rate is 80 heartbeats/minute, the blood's specific gravity is 1.060 and its viscosity is 0.0027 kg/m. s. determine, (1) the reynolds number of blood flow through this healthy vessel. (ii) the friction factor (assume the blood vessel is smooth). (iii) the pressure drop across the vessel.

1in2 processor chip can be modelled as an isothermal plane wall of silicon, isothermal on both sides. the power input to the bottom of the plane wall, or the processing power of the chip, often called the thermal design power (tdp), is 100w. assume the periphery is adiabatic. the silicon is 400 microns thick. the temperature at the junction, or in this case on the bottom of the isothermal plane wall, is 85°c. what is the top surface temperature, assuming that the only mode of heat transfer is conduction