During blood transfusion the needle is inserted in a vein where the gauge pressure is 2000 Pa. At what height must the blood container be placed so that blood may just enter the vein ? [Density of whole blood $= 1.06 \times 10^{3} k g m^{- 3}$ ].

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Solution

Gauge pressure, $P = 2000 P a$
Density of whole blood, $ρ$ = $1.06 \times 10^{3}$ kg/ m $^{3}$
Acceleration due to gravity, $g = 9.8 m / s^{2}$
Height of the blood container $= h$
Pressure of the blood container, $P = h ρ g$
$h = P / ρ g$
$= 2000 / (1.06 \times 10^{3} \times 9.8)$
$= 0.1925 m$
The blood can enter the vein if the blood container is kept at a height higher than 0.1925 m, i.e., about 0.2 m

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During blood transfusion the needle is inserted in a vein where the gauge pressure is 2000 Pa. At what height must the blood container be placed so that blood may just enter the vein ? [Density of whole blood =1.06×103kgm−3].

During blood transfusion the needle is inserted in a vein where the gauge pressure is 2000 Pa. At what height must the blood container be placed so that blood may just enter the vein ? [Density of whole blood $= 1.06 \times 10^{3} k g m^{- 3}$ ].