A piece of paper with a mass of 0.002 kg falls from a height of 8 m. It experiences air resistence. Based on what you know about friction, what can you say about the kinetic energy of the paper as it reaches the ground? Acceleration due to gravity is g=9.8 m/s²

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 =