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A steam turbine receives water at 2000 lbf/in 2, 1200 F at a rate of 200lbm/s. In the middle section 40lbm/s is withdrawn at 300 lbf/in 2, 650 F
A steam turbine receives steam from two boilers. One flow is 5 kg/s at 3 MPa, 700°C and the other flow is 15 kg/s at 800 kPa, 500°C.
The balloon is made such that the pressure inside is proportional to the diameter. The valve is now opened, allowing ammonia to flow into the tank
A spherical helium balloon of 30 ft in diameter is at ambient T and P, 60 F and 14.69 psia. How much helium does it contain?
As shown in Fig. a spring having an initial unscratched length of l0 is stretched by a force F applied at its end.
A steady combustion of natural gas yields 0.15 kg/s of products (having approximately the same properties as air) at 1100°C, 100 kPa
A stagnation pressure of 108 kPa is measured for an air flow where the pressure is 100 kPa and 20°C in the approach flow. What is the incoming velocity
A spring compresses in length by 0.12 in. for every 1 lbf of applied force. Determine the deflection, in inches, of the spring caused by the weight of an object
A steady-flow Carnot cycle uses water as the working fluid. Water changes from saturated liquid to saturated vapor as heat is transferred to it from a source
A steady supply of 1.0 m3/s air at 25°C, 100 kPa, 50% relative humidity is needed to heat a building in the winter
A steady stream of equimolar N2 and CO2 mixture at 100 kPa and 18°C is to be separated into N2 and CO2 gases at 100 kPa and 18°C
A small expander (a turbine with heat transfer) has 0.05 kg/s helium entering at 1000 kPa, 550 K and it leaves at 250 kPa, 300 K
A small elevator is being designed for a construction site. It is expected to carry four 75-kg workers to the top of a 100-m tall building in less than 2 min.
A small dam has a pipe carrying liquid water at 150 kPa, 20?C with a flow rate of 2000 kg/s in a 0.5 m diameter pipe. The pipe runs to the bottom of the dam
A sluice gate dams water up 5 m. There is a small hole at the bottom of the gate so liquid water at 20oC comes out of a 1 cm diameter hole.
A ski lift has a one-way length of 1 km and a vertical rise of 200 m. The chairs are spaced 20 m apart, and each chair can seat three people
A small water pump on ground level has an inlet pipe down into a well at a depth H with the water at 100 kPa
A small flexible bag contains 0.1 kg ammonia at -10oC and 300 kPa. The bag material is such that the pressure inside varies linear with volume
A spherical balloon contains 2 kg of R-22 at 0°C, 30% quality. This system is heated until the pressure in the balloon reaches 600 kPa.
A spherical balloon contains 10 lbm of air at 30 psia and 800 R. The balloon material is such that the pressure inside is always proportional
A soap bubble has a surface tension of S = 3* 10-4 N/cm as it sits flat on a rigid ring of diameter 5 cm. You now blow on the film to create a half sphere
A small, high-speed turbine operating on compressed air produces a power output of 100 W. The inlet state is 400 kPa, 50°C, and the exit state is 150 kPa
A rope hangs over a pulley with the two equally long ends down. On one end you attach a mass of 5 kg and on the other end you attach 10 kg.
A room is heated with an electric space heater on a winter day. Examine the following control volumes, regarding heat transfer and work, including sign.
A room is filled with saturated moist air at 25°C and a total pressure of 100 kPa. If the mass of dry air in the room is 100 kg, the mass of water vapor.