A 0.700-kg particle has a speed of 1.90 m/s at point and kinetic energy of 7.10 J at point . (a) What is its kinetic energy at ? J (b) What is its speed at ? m/s (c) What is the net work done on the particle by external forces as it moves from to ?

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 =