Question

During blood transfusion the needle is inserted in a vein where the gauge pressure is `2000Pa` . At what height must the blood container be placed so that blood may just enter the vein? Density of whole blood = `1.06xx10^(3)Kg//m^(3)`.

Answer 1

`h=(P)/(rho g) = (2000)/(1.06xx10^(3)xx9.8) = 0.1925m`.
The blood may just enter the vein if the height at which the blood container be kept must be slightly greater than `0.1925m` ie, `0.2m`.