Blood plasma has a density of 1026 kg/m^3. What is the minimum height above a vein should...?
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Blood plasma has a density of 1026 kg/m^3. What is the minimum height above a vein -- in which the blood pressure is 16 torr -- that a container of blood plasma should be placed in order for the plasma to enter the vein? The answer given is h=21 cm.
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Answer:
the hydrostatic pressure of the plasma in the container must at least be 16 torr, otherwise the blood would flow out of the vein. Hydrostatic pressure is p = ρgh where ρ = density in kg/m^3, g = grav. acceleration, h = height in m, and p is in N/m^2 760 torr = 1.013*10^5 N/m^2 16 torr = 1.013*10^5*16/760 N/m^2 = 2133 N/m^2 put into equation for p 2133 = 1026*9.81*h h = 0.212 m <-- minimum necessary height OG
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