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A piston/cylinder contains 1 kg water at 20oC with volume 0.1 m3. By mistake someone locks the piston preventing it from moving while we heat the water
A piston/cylinder contains 2 kg of air at 27?C, 200 kPa, shown in Fig. The piston is loaded with a linear spring, mass and the atmosphere
A piston/cylinder arrangement contains 1 kg of water, shown in Fig. The piston is spring loaded and initially rests on some stops
A piston cylinder contains 1 kg water at 20oC with a constant load on the piston such that the pressure is 250 kPa
A piston cylinder contains 0.5 kg air at 500 kPa, 500 K. The air expands in a process so P is linearly decreasing with volume to a final state of 100 kPa
A piston cylinder contains 0.1 kg air at 100 kPa, 400 K which goes through a polytropic compression process with n = 1.3 to a pressure of 300 kPa.
A pipe, cross sectional area 0.1 m2, carries a flow of 75% O2 and 25% N2 by mole with a velocity of 25 m/s at 200 kPa, 290 K
A pipe flows water at 15oC from one building to another. In the winter time the pipe loses an estimated 500 W of heat transfer. What is the minimum required
A piston, mp= 5 kg, is fitted in a cylinder, A = 15 cm2, that contains a gas. The setup is in a centrifuge that creates an acceleration of 25 m/s2
A piston, mp = 10 lbm, is fitted in a cylinder, A = 2.5 in 2, that contains a gas. The setup is in a centrifuge that creates an acceleration of 75 ft/s2
A piston cylinder has R-134a at -20oC, 100 kPa which is compressed to 500 kPa in a reversible adiabatic process.
A piston cylinder has constant pressure of 2000 kPa with water at 20oC. It is now heated up to 100oC. Find the heat transfer and the entropy change
A piston cylinder has 2.5 kg ammonia at 50 kPa, -20oC. Now it is heated to 50oC at constant pressure through the bottom of the cylinder from external hot gas
A piston cylinder contains air at 600 kPa, 290 K and a volume of 0.01 m3. A constant pressure process gives 54 kJ of work out. Find the final temperature
A nonlinear spring has the force versus displacement relation of F = kns(x - x0) n. If the spring end is moved to x1 from the relaxed state
A nitrogen line, 540 R, and 75 lbf/in 2, is connected to a turbine that exhausts to a closed initially empty tank of 2000 ft3.
A mixture that is 20 percent carbon dioxide, 10 percent oxygen, and 70 percent nitrogen by volume undergoes a process from 300 K and 100 kPa
A Pennsylvania coal contains 74.2% C, 5.1% H, 6.7% O, (dry basis, mass percent) plus ash and small percentages of N and S.
A paper mill has two steam generators, one at 4.5 MPa, 300°C and one at 8 MPa, 500°C. Each generator feeds a turbine, both of which have an exhaust pressure
A pan in an auto shop contains 5 L of engine oil at 20oC, 100 kPa. Now 2 L of hot 100oC oil is mixed into the pan
A nozzle is required to produce a flow of air at 200 m/s at 20°C, 100 kPa. It is estimated that the nozzle has an isentropic efficiency of 92%.
A piece of hot metal should be cooled rapidly (quenched) to 25°C, which requires removal of 1000 kJ from the metal. The cold space that absorbs the energy
A piece of experimental apparatus is located where g = 9.5 m/s2 and the temperature is 5°C
A person whose mass is 150 lb weighs 144.4 lbf. Determine (a) The local acceleration of gravity, in ft/s2,
A person eats a McDonald's Big Mac sandwich (530 Cal), a second person eats a Burger King Whopper sandwich (640 Cal), and a third person eats 50