When discussing magnetic fields we could say that (2 points) A- Metals Can Become Magnetic If They Have Many Spinning Electrons That Create Magnetic Fields

B- Metals are Magnets Because They Have More Electrons Than Non-Magnetic Fields

C- Non-Paired Electrons Spin In Opposite Directions Creating A Magnetic Field

D- The Spinning Electrons In Some Atoms Pair Up And Create A Magnetic Field

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 =