from __future__ import division
#Variable declaration:
r1 = 0.8 #radius of fuse wire(mm)
I1 = 8 #blow current at r1 radius(A)
I2 = 1 #blow current(A)
#Calculation:
r2 = r1*(I2/I1)**(2/3) #radius for bearing 1 A of blow current(mm)
#Result:
print "The radius of the wire that will blow off at a current of 1A is",r2,"mm"