A Ground water was anaylzed as follows; Co2= 30 mg/L as CaCO3
Ca2+= 180 mg/L as CaCO3
Mg+2= 120 mg/L as CaCO3
Na+= 80 mg/L as CaCO3
Alkalinity = 360 mg/L as CaCO3
SO42- = 10 mg/L as CaCO3
Cl- = 10 mg/L as CaCO3
pH = 7.2
Would softening be recommended for this water? Determine the following quantities (as mg/L of CaCO3): Total hardness, calcium hardness (both carbonate hardness [CH] and non-carbonate hardness[NCH]), and magnesium hardness (both CH and NCH)

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)