The shinkansen, the japanese "bullet" train, runs at high speed from tokyo to nagoya. riding on the shinkansen, you notice that the frequency of a crossing signal changes markedly as you pass the crossing. as you approach the crossing, the frequency you hear is f; as you recede from the crossing the frequency you hear is 2f/3.what is the speed of the train?

The velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

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 =