Blood is a viscous fluid. If due to plaque, the cross-sectional area of an artery is reduced by a factor 4 over a segment with a length of 1.5 cm, approximately by what factor would the pressure difference between both ends of this segment need to be increased in order to maintain the same flow?
The Attempt at a Solution
Doesn't only height matter and not the cross-sectional area? Any help is greatly appreciated!!!