In [5]:

```
# Variables
u = 2.08/32.2; # vismath.cosity of water at 80degF in slug/ft-hr
rho = 62.4/32.2; # density of water in slug/ft**3
d = 2./12; # inner diameter of tube in ft
v = 10.; # average water velocity in ft/sec
# Calculations
V = 0.0648/1.94
Nre = d*v*3600/V; # reynolds number
# 3600 is multiplies to convert sec into hrs
# Results
print "Reynolds Number is %d"%(Nre);
# rounding off error.
```

In [7]:

```
# Variables
u = 2.08/32.16; # vismath.cosity of water at 80 degF in slug/ft-hr
m = 965000/32.16; # mass velocity of water in slug/hr-ft
# Calculations
d = 1./12; # inner diameter of tube in ft
Nre = m*d/u; # reynolds number
# Results
# 3600 is multiplies to convert sec into hrs
print "Reynolds Number is %d"%(Nre);
# book answer is rounded off.
```