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4.93 A horizontal constant-diameter pipe with a build-up of debris is shown in Fig. P4.93.

4.72 Oil enters a counterflow heat exchanger at 450 K with a mass flow rate of 10 kg/s and exits at

4.75 An air-conditioning system is shown in Fig. P4.75 in which air flows over tubes carrying

A system consisting of 1 kg of water undergoes a power cycle composed of the following processes:

6.145 Air enters the compressor of a gas turbine power plant operating at steady state at 290 K, 100

4.59 Refrigerant 134a enters an air conditioner compressor at 4 bar, 20°C, and is compressed at

4.51 Steam at 1800 lbf/in.2 and 1100°F enters a turbine operating at steady state. As shown in Fig.

6.18 Steam enters a turbine operating at steady state at 1 MPa, 200°C and exits at 40°C with a

6.30 One-tenth kg of a gas in a piston–cylinder assembly undergoes a Carnot power cycle for which

4.52 Hot combustion gases, modeled as air behaving as an ideal gas, enter a turbine at 145 lbf/in.2

4.42 Steam enters a well-insulated turbine operating at steady state at 4 MPa with a specific

4.65 As shown in Fig. P4.65, a pump operating at steady state draws water from a pond and delivers

4.49 Water vapor enters a turbine operating at steady state at 500°C, 40 bar, with a velocity of 200

4.37 As shown in Fig. P4.37, air enters the diffuser of a jet engine operating at steady state at 18

4.47 Steam enters a turbine operating at steady state with a mass flow of 10 kg/min, a specific

Determine the magnitude and direction of the resultant force. Give the direction as an angle

4.35 Helium gas flows through a well-insulated nozzle at steady state.

4.58 Air enters a compressor operating at steady state with a pressure of 14.7 lbf/in2 a temperature

4.46 A well-insulated turbine operating at steady state develops 28.75 MW of power for a steam flow

4.17 As shown in Fig. P4.17, air with a volumetric flow rate of 15,000 ft3/min enters an

4.15 Liquid water flows isothermally at 208°C through a one-inlet, one-exit duct operating at steady

6.22 A system consisting of 2 kg of water initially at 160°C, 10 bar undergoes an internally

3.63 A closed, rigid tank filled with water, initially at 20 bar, a quality of 80%, and a volume of

3.33 Two kg of Refrigerant 134A undergoes a polytropic process in a piston–cylinder assembly from an