The vertical dimension of the bracket is ℓ=12.3 cm and the screw is at the midpoint. a downward force =147 n is applied to the bracket a distance =5.2 cm from the wall. the weight of the bracket is tiny compared to so ignore the force of gravity on the bracket. what is the horizontal component of the force that the screw exerts on the bracket? hint: imagine that the bracket is slightly loose.

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 =