A car is sitting at a stoplight. When the light changes, the car accelerates at a rate of 11.8 m/s2 until it reaches the speed limit of 30 mph. The car maintains this speed for 4.9 s, at which time the driver sees the next stoplight turn red and immediately begins to decelerate steadily, coming to rest 7.0 s later. What is the distance between these successive stoplights

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 =