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:
5.
A closed tank having a volume of 2 ft
3
is filled
with 0.30 lb of gas. A pressure gage attached
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 Fall '09
 FU
 stenosis

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