Arturo dreams about travelling to faraway stars someday. He read that the closest star to Earth is Proxima Centauri, which is 4.25 light years away. He also read that the Law of Special Relativity says that the mass of an object increases as its speed increases. It approaches infinity as it approaches the speed of light. How does this most likely affect the goals of the United States space program?

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 =