7.30 Shown in the table below are several
ow situations and the associated characteristic
velocity, size, and uid kinematic viscosity.
Detemiine the Reynolds number for each of the
flows and indicate for which ones the inertia?
eects are small relative to
548 Tim Wind blows Elmiugh a 7 ft >< 18ft garage door opening I T
with a speed of 5 ft/s as shown in Fig. 1353 Determine the average
speed, V, of the air through the two 3 ft X 4 ft openings in the win-
For 5%edd/v 12/1 c
7.! What are the dimensions of density, ,
pressure, specic weight, surface tension, and dy-
namic viscosity in (a) :the FLT system, and (b)
the MLT system? COmpare your results with
those given in Table'1.1 in Chapter 1. .
/ = 4995* = (3455 -
3.2 Air ows steadily along a streamline from point (1) to point (2)
- with negligible viscous effects. The following conditions are mea-
sured: At point (1) zl = 2 m and p1 = 0 kPa; at point (2) a: = 10
m, p; = 20 Nlmz, and V2 = 0. Determine tho velocity
22, 3251 1:4.qu Hammer
#0er No.3 Sis/1,3075%
2. 69 A 0.3-rn-diameter pipe is connected to
a 0.02-rn-diameter pipe and both are rigidly held
in place. Both pipes are horizontal with pistons
at each end. If the space between the pistons is
lled with water.
2. [2 Develop an expression for the pressure
variation in a liquid in which the specic weight
increases with depth, h; as y -= Kh + Pu, where
K is a constant :ihd yo is the specic weight at the
f/(Irrr/ 2.11 (See Fluids in the News article t