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# Revision history [back]

### Unexpected solve() errors

#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(PpVt == nr*t,n,solution_dict=1) v3=eng5[0] v4=n(v3) n(v4)  __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

Why?

# Area [m^2]

#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(PpVt == nr*t,n,solution_dict=1) v3=eng5[0] v4=n(v3) n(v4)  __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

Why?

 3 No.3 Revision Shashank 1897 ●30 ●50 ●83

# Area [m^2]

#Area [m^2]
Ab = 0.00313659226 CB Ratio 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: one:

#Ideal Gas Law[Relates Pressure and Volume]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
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(PpVt solve(Pp*Vt == nr*t,n,solution_dict=1)
n*r*t,n,solution_dict=1)
v3=eng5[0]
v4=n(v3)
n(v4)


__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

Why?

### Unexpected solve() errors

#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*Vt == n*r*t,n,solution_dict=1)
v3=eng5[0]
v4=n(v3)
n(v4)


__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

Or it just shows the fraction. It's been acting weird lately

Why?