Specifications for a proposed earth fill require that the soil be compacted to 95% of the standard Proctor dry density. Tests on s Glacial-Till borrow material indicate a maximum dry density of 124 pcf at an optimum moisture content of 12%. The borrow material in its natural condition has a void ratio of 0.60. If the Gs of the soil particles is 2.65, what is the minimum volume of borrow required to make 1 cubic foot of acceptable compacted fill?

An air-conditioning system consists of a heating section and an evaporative cooler. air enters the heating section at 10°c and 70 percent relative humidity at a rate of 30m^3/min, and it leaves the evaporative cooler at 20°c and 60 percent relatively humidity. if the air conditioning system operates at a total pressure of 98 kpa, determine (a) the temperature and relative humidity of the air when it leaves the heating section, (b) the rate of heat transfer in the heating section, and (c) the rate of water added to air in the evaporative cooler