Consider a blood vessel with a pressure waveform traveling at wave speed Co,b (baseline). If under disease conditions the thickness of the vessel wall is increased by 50% and the cross-sectional area is halved, by what factor does the wave speed change?
Given Equation: 
where E= Young's Modulus, h=wall thickness, 
=density,
d=vessel diameter
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Consider a blood vessel with a pressure waveform traveling at
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