Answer –
According to the question, the density of whole blood is
ρ = 1.06 × 103 kg m-3
Gauge pressure is
P = 2000 Pa
Acceleration due to gravity is
g = 9.8 m/s2
=P/ρg =200/(1.06 x 103 x 9.8)
=0.1925 m
If the height at which the blood container is held must be slightly greater than 0.1925 m i.e„ 0.2 m, the blood may just enter the vein.