Air at 10 deg. C and 80 Kpa enters a diffuser of a jet engine steadily with avelocity of 200 m/s. The inlet area of diffuser is 0.40 m^2. Determine the mass flow rate of air.

Air pass thru a nozzle with efficiency of 90%. The velocity of air at the exit is 600 m/s. find the actual velocity at the exit.

A spherical balloon with a diameter of 6 m is filled with helium at 20 deg. C and 200 Kpa. Determine the mole number.

The pressure of an automobile tire is measured to be 200 Kpa (gage) before the trip and 220 kpa (gage) after the trip at a location where the atmospheric pressure is 90 kpa. If the temperature of the air in the tire before the trip is 25 deg. C, the air temperature after the trip is:

Predict the pressure of nitrogen gas at T=200K and v=0.00385 m^3/kg and b=0.00141 m^3/kg; a=0.178 m^2 kpa/kg^2. Use van der waals equation,

A rigid container is closed at one end and measures 8 in diameter by 12 in long. The container is held vertices and slowly moved downward until the pressure in the container is 17psia. What will be the depth of the top of the container from the free water surface?

Compute the amount of condensate form during 10 minutes warm-up of 180 meter pipe conveyors the saturated steam with enthalpy vaporization hfg = 1,947.6 kj/kg. the minimum external temperature of pipe is 2 DegC. The final temperature of pipe is 195 degC. The specific heat of pipe material is 0.6 kj/kg-C. the specific weight if 28 g/m.

An auditorium seating 1500 people is to be maintained at 80degF dry bulb and 65degF wet bulb temp. when outdoor air is at 91degfF dry bulb and 75degF wet bulb. Solar heat loads is 110,000 btu/hr and supply air is at 60degF, determine the amount of air supply.

A waste heat recovery boiler produces 4.8 Mpa (dry Saturated) steam from 104 deg C feed water. The boiler receives energy from 7 kg/sec of 954 deg C dry air. After passing through the waste heat boiler, the temperature of the air has been reduced to 343 degC. How much steam in kg is produced per second? Note at 4.60 Mpa dry saturated, h = 2796.

A 4 m^3/hr pump delivers water to a pressure tank. At the start, the gage reads 138 Kpa until reads 276 KPa and then pump was shut off. The volume of the tank is 100 liters. At 276 Kpa the water occupied 2/3 of the tank volume. Determine the volume of water that can be taken out until the gage reads 138 Kpa.

A refrigeration plant is rated at 15 tons capacity. How many pounds of air per hour will it cool from 70 to 90 DegF at constant pressure.

an air standard engine has a compression ratio 18 and a cut-off ratio 4. If the intrake air pressure and temperature are 100 kpa and 27deg C, find the work in KJ per kg.

determine the air standard efficiency of an operating on the diesel cycle with clearance of 6% , when the suction pressure is 99.97 kpa and the fuel is injected for 7% of the stroke. Assume k=1.4.

steam at 2Mpa and 250deg C in a rigid cylinder is cooled until the quality is 30%. Find the heat rejected from the cylinder.

The following coal has the following ultimate analysis by weight: C = 70.5% H2 = 4.5% O2 = 6.0% N2 = 1.0% S =3.0% Ash = 11% Moisture = 4% A stocker fired boiler of 195,00 kg/hr steaming capacity used this coal as fuel. Calculate the volume of air in m^3/hr with air at 60 deg. F and 14.7 psia pressure if boiler efficiency is 70% and FE = 1.10

23.5 kg of steam per second at 5 Mpa and 400 deg. C is produced by a steam generator. The fedwater enters the economizer at 145 deg. C and leaves at 205 deg. C. the steam leaves the boiler drum with a quality of 98%. The unit consumes 3 kg of coal per second as received having a heating value of 25,102 KJ/kg. What would be the overall efficiency of the unit in percent? Steam properties : At 5 Mpa and 400 deg. C: h = 3195.7 KJ/kg at 5 Mpa; hf = 1154.23, hfg = 1640.1 At 205 deg C: hf = 875.04 at 145 deg. C: hf = 1640.1

In an rankine cycle steam enters the turbine the turbine at 2.5 Mpa (enthalpies and entropies given) and condenser of 50 kPa (properties are given) what is the thermal efficiency of the cycle?.