A mixture of 1080 g of gravel with effective absorption of 0.9 % and 720 g of sand with surface moisture of 2.51 % was added to a concrete mix. Determine the adjustment that must be made to the added water to maintain a constant water-cement ratio.

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.