Determine the quantities of materials required per cubic yard to create a concrete mix. The specifications state that the maximum aggregate size is 3 ½ " and require a minimum cement content of nine (9) sacks per cy and a maximum water-cement ratio of 0.60 with 9% air voids. Assume a 35%/65% fine/coarse aggregate ratio. Hint: use the average specific gravity for aggregate from your equation sheet to find the weight of aggregate.
(enter your answer to the nearest tenth (rounded). Do not use a percent sign or units.)
Volume of cement (cf/cy):
Volume of water (cf/cy):
Volume of air (cf/cy):
Volume of aggregate (cf/cy):
Volume of fine aggregate (cf/cy):
Volume of coarse aggregate (cf/cy):
Weight of coarse aggregate (lb/cy):

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

What is the main objective of using reheat rankine cycle?

Aheat pump with refrigerant-134a as the working fluid is used to keep a space at 25°c by absorbing heat from geothermal water that enters the evaporator at 500c at a rate of 0.065 kg/s and leaves at 40°c. the refrigerant enters the evaporator at 20°c with a quality of 23 percent and leaves at the inlet pressure as saturated vapor. the refrigerant loses 300 w of heat to the surroundings as it flows through the compressor and the refrigerant leaves the compressor at 1.4 mpa at the same entropy as the inlet. determine: (a) the degrees of subcooling of the refrigerant in the condenser, b)-the mass flow rate of the refrigerant . (c) the heating load and the cop of the pump, and d)-the theoretical minimum power input to the compressor for the same heating load.