The hydrostatic blood pressure difference between the head and the feet of a boy standing straight is 1.65 x 104 Nm-2. Find the height of the boy. [ Density of blood = 1.1 x 103 kgm-3, g = 10ms-2]
A. 0.5 m B. 0.6 m C. 1.5 m D. 2.0 m
Correct Answer: C
Explanation
[ Density of blood = 1.1 x 103 kgm-3, g = 10ms-2] Pressure = pgh, where p = density, h = the height, g = acceleration of free fall due to gravity 1.6.5 x 104 = 1.1 x 103 x 10 x h therefore h = 1.65 x 104/1.1 x 103 x 10 = 1.5m
