The earth's atmosphere is about 300 miles (480 kilometers) thick, but most of it is within 10 miles (16 km) the surface. let take the average air density pair atmospheric carbon dioxide was 405.0 parts per million (ppm for short). calculate the total mass (in metric ton) of the carbon dioxide in the atmosphere (radius of earth 6367 km) = 1.29 kg/m2. in 2017, the global average

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

You can decrease the resistance of a length of wire by

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 =