The four best metallic conductors are: a. gold b. cadmium c. alloys d. copper e. silver f. sodium g. aluminum h. iron i have to pick 4

What is the frequency of a light wave with a wavelength of 620nm

How would a small bar magnet be oriented when placed at position x?

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.