In the si system, the unit of current, the ampere, is defined by this relationship using an apparatus called an ampere balance. what would be the force per unit length of two infinitely long wires, separated by a distance 1 m, if 1 a of current were flowing through each of them? express your answer numerically in newtons per meter. f/l = n/m

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =