Question

Neglecting the pressure drop due to resistance, calculate the blood pressure, in pascals, in an artery in the brain 30 cm above the heart. The pressure at the heart is 120 mm Hg. The density of blood is 1.05 g/cm2 and the density of mercury is 13600 kg/m2. Do not type in units.

Answer 1

ginen the height between tow points 'B' at Bruin & 'H' cat heart is, BH = h = 30 cm = 30x10 ginen, Press are at point it is PH 120mm ul Hg PH (1203103 » 13600x918 9.8) 11 W/m2 PH= 15993.6 N/m2 it, PB is the Press are in the aptery in Brain then PHPB = hpg where, e is the density of blood. PB = PH-heg we Pit=15993.6 Nim? hane ginen, has 30x10 m, & g =9.8 mis? & P= 1.05 g/cm3

3 =) po los x 10 kg/m3 = P2 = (18993.6-(1.05+10% 30810 29.8)} 6 N/m2 PB = 12906.6 N/m2 Since, Inim²= Ipa PB- N 2 12906.6 pa so the answer is 12906.6 if p is the liquid mano neter density of unknown Pressure in this دعا one uses P,=hpg that & with Water density d=19/cm3 = 1000 kg/m3 it the reading is n then Press are, Pzz nag

na d TA sls d cm 909.1 kg/m3 since both gines es the same Pressure hence, hog=nag heal P = h=16somm 1650x10 cm & ds looo kg/m3 pa 150 Pa 909.0909091 kg/m3 ginen, n'= 150 & = > % Toon ooo) ugima 165 pa loud e. kg/m3 pa n go answer is 909.1