#Given
H1=1.4*10**5 #A/m
H2=4.2*10**5
T1=14 #K
T2=13
Tc=14.5
H0=20.66*10**5 #A/m
T=4.2
#Calculation
Hc=H0*(Tc**2-T**2)/Tc**2
#Result
print"Critical field is",round(Hc*10**-5,1),"*10**5 A/m"
#Given
Tc1=4.185 #K
M1=199.5
M2=203.4
#Calculation
import math
Tc2=Tc1*math.sqrt(M1)/math.sqrt(M2)
#Result
print"Critical temperature is",round(Tc2,2),"K"
#Given
T=4.2 #K
H0=6.5*10**4 #A/m
Tc=7.18
d=10**-3
#Calculation
Hc=H0*(Tc**2-T**2)/Tc**2
Jc=4*Hc/d
#Result
print"Critical current is", round(Jc*10**-8,3),"*10**8 A/m**2"
#Given
w=750 #A
T=3.5
Tc=4.12
h=6.02*10**26
a=13.55*10**3
M=200.6
#Calculation
import math
W=w*math.sqrt(1-(T/Tc)**4)
n0=h*a/M
ns=n0*(1-(T/Tc)**4)
#Result
print"Penetration is", round(ns*10**-28,2)*10**28,"/m**3"