An ideal spring of negligible mass is 13.00 cm long when nothing is attached to it. when you hang a 3.00-kg weight from it, you measure its length to be 14.50 cm . if you wanted to store 10.0 j of potential energy in this spring, what would be its total length? assume that it continues to obey hooke's law. express your answer numerically. if there is more than one answer, enter each answer, separated by a comma.

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 =