A typical human aorta, or main artery from the heart, is 1.8 cm in diameter and carries blood at a speed of 35 cm/s. The clot reduces the flow area by 80%? If the blood pressure in the unobstructed artery is 16 kPa gauge (about 120 mm of mercury, in the unit commonly reported by doctors), what will it be at the clot? The density of blood is 1060 kg/m^3 . Note: Too low a pressure can actually collapse the artery, momentarily cutting off blood flow.