An electron starts with a speed of 5.50×105 m/s . It moves in a region with an electric field. Some time later the electron has been brought to res What is the change in electric potential V in going from the initial to the final position? Make sure your sign is correct. Express your answer with the appropriate units.

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 =