```
#Area [m^2]
Ab = 0.00313659226
```

` `# CB Ratio

```
cb = 0.262
eng4 =[solve(cb == Vc/(Ab*Lb),Lb) for Vc in xrange(0.000001,0.00002)]
print(eng4)
```

This returns an empty list [] and I have no idea why.
And this one:
`#Ideal Gas Law[Relates Pressure and Volume]`

` `# Definitions v3

# Main Tank Pressure[Pascals]

Pp=1013529.32

# Tank Volume[m^3]

Vt=0.0013929

# Moles of Air

# Gas Constant

r=8.3144621

# Ambient Temperature[Kelvin][70F]

t= 294.261

`eng5= solve(Pp`

__main__:18: DeprecationWarning: Substitution using function-call syntax and unnamed arguments is deprecated and will be removed from a future release of Sage; you can use named arguments instead, like EXPR(x=..., y=...)
See http://trac.sagemath.org/5930 for details.
75589949342674/131001015929725*Vt == n*r*t,n,solution_dict=1)
v3=eng5[0]
v4=n(v3)
n(v4)

Why?