Magnetic field lines surrounding a magnet are conventionally drawn
a. from south to north.
b. from north to south.
c. either way.

Place me with this question is my last question

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 =

As the distance from a magnet increases, what happens to the magnet force?