a 100 kg car enters a level curve at 20m/s. if the curve has a radius of 80 m, what centripetal force must be applied by friction to keep the car from skidding?

You can decrease the resistance of a length of wire by

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 =

Which type of reaction is shown in this energy diagram ?