Samples of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities. The following weights are found: Mass of moist aggregate sample as brought to the laboratory: 1784 g Mass of oven dried aggregate: 1750 g Mass of aggregate submerged in water: 1150 g Mass of SSD aggregate: 1777 g Determine: 1) the bulk specific gravity 2) the aggregate apparent specific gravity 3) the moisture content of stockpile aggregate in [%] 4)absorption in [%]

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.