# Example 2.1
10 hp; kW

# Example 2.2
10 gal / min; l / s

# Example 2.3
3 mW; hp
632.8 nm; in

# Example 2.4
wgt = 365000 lb; N
mass = wgt / grav(); slug; kg

# Example 2.5
m1 = 1 g
v1 = 8 km / s
u = (1/2) * m1 * v1^2; J; ft lbf
m2 = 0.31 lb / grav();
v2 = sqrt(2 * u / m2); ft / s

# Example 2.6
d = 6 mm
len = 65 mm
f = 50 N
E = 200 GPa
del_x = 64 * f * len^3 / (3 * pi() * E * d^4); mm

# Example 2.7
p_sea_level = 14.7 psi  
p_out = 0.3 * p_sea_level; psi
p_in =  0.7 * p_sea_level; psi
w = 3 ft 
h = 6 ft 
a = w * h; in^2  
f = a * (p_in - p_out); lbf 

# Example 2.8
f = 700 N
t = 10 s
d = 3 m
p = f * d / t; W
eff = 0.8   
pwr_net = eff * p; W   


# Homework Problems:

TBD