A modern home uses approximately 250 kWh per year to heat each square
meter of floor space. Suppose a 4,300-square-meter house draws electricity
from a coal-burning power plant. How much carbon dioxide is released into the
atmosphere as a result of this home's heating needs?

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 =