Hi can I ask for the answer for no. 1 to 5

Thank you.

1. A moist airstream with a pressure of 100kPa has an initial DB of 27"C and a WB of 24"C. Use the 101 kPa psychrometric chart (see in section Assignment 2) to calculate the end DB/WB to this original airstream when subjected to the following processes from the initial air state in each case: (a) Heating at constant moisture content, raising the specific enthalpy by 8 KJ/kg. (b) Enthalpy increase of 8 KJ/kg, moisture content increases to 19 g/kg. (c) Constant DB cooling to a moisture content of 0.01 kg/kg. (d) Constant DB heating to a relative humidity of 90%. (e) Constant WB process to a relative humidity of 30%. (f) Constant WB process to saturation. (g) Constant moisture content process to saturation/ 2. The following two airstreams mix at the junctions of two roadways. The first airstream has a mass flow of 36 kg/s and a dry/wet bulb of 32/24'C, the second airstream has a mass flow of 16 kg/s and a dry /wet bulb of 31/21"C. The pressure is 100 kPa. Determine the dry/wet bulb temperatures of the mixed airstream. 3. During a 40 h underground working week radiological monitoring indicates that a miner is subjected to the following levels and periods of exposure to radon daughters: 20 h at 0.15 WL 10 h at 0.21 WL 10 h at 0.39 WL Determine the cumulative exposure in WLM for that week. 4. In a given stope 450m' of ore and 150m' of waste rock surface are exposed. The stope also contains 3000 tonnes of broken ore. Assuming the ore has a density of 3000 kg/m', determine the rate of emanation into the stope given the following: J (ore) = 550 pCi/m's B (ore) = 600 pci/m's J (waste) = 85 pCi/m 5. The conditions at the entrance to a crosscut are temperatures, WB=25*C, DB=29"C and barometric pressure 110 kPa. At the exit of the crosscut the temperatures are WB=30'C, DB=32"C and the barometric pressure 110 kPa. The volume flow at the entrance is 34m /s. Determine the following: . the water picked up in litres per day . the heat picked up by the air in kW . the increase in relative humidity