1.

During blood transfusion the needleis 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 ? [Use the density of whole blood from Table 10.1]

Answer»

Solution :Here gauge PRESSURE `P=2000Pa`
Density of BLOOD `rho=1.06xx10^(3)kgm^(-3)`
`g=9.8ms^(-2)`
The HEIGHT of vein of blood container =h Gauge pressure
`P=grhog`
`h=(P)/(rhog)`
`=(2000)/(1.06xx10^(3)xx9.8)`
`=192.5xx10^(-3)`
`=0.192m`
`thereforeh=2.0m`


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