# hw1 - 1 The pressure difference P across a partial blockage...

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1. The pressure difference, P, across a partial blockage in an artery (stenosis) is approximated by the equation: Where V, is the blood velocity, μ the viscosity (FL -2 T), ρ the blood density (ML -3 ), D the artery diameter, A 0 the area of the unobstructed artery, and A 1 the area of the stenosis. Determine the dimensions of the constants K v and K u . Would this equation be valid in any system of units? Solution: . 2. Make use of table 1.2 to express the following quantities in SI units: a) 10.2 in/min b) 4.81 slugs c) 3.02 lb d) 73.1 ft/s 2 e) 0.0234 (lb s)/ft 2 Solution: 3. The specific weight of a certain liquid is 85.3 lb/ft 3 . Determine its density and specific gravity. Solution: := p + Kv μ V D Ku - A 0 A 1 1 2 ρ V 2

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4. The density of oxygen contained in a tank is 2.0 kg/m 3 when the temperature is 25 o C. Determine the gage pressure of the gas if the atmospheric pressure is 97 kPa. Solution:
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hw1 - 1 The pressure difference P across a partial blockage...

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