The figure below shows a piston-cylinder assembly fitted with a spring of stiffness k = 29.7 N/m whose relaxed state occurs when the piston touches the left wall of the cylinder. The cylinder contains air and the spring is in a vacuum. The piston face, which has an area of 178 cm², is 99 cm from the left wall after being initially pressurized with air. During a hold, in which no additional air enters the assembly, a force f = 7.7 N is required as shown. After the hold, the piston is observed to move 22 cm to the right. Friction between the piston and cylinder is negligible. Cross-sectional Area, A P, T X air vacuum If 10.7 J of heat is transfered to the air, determine the change in the air's internal energy, AU, in J. U = number (rtol=0.05, atol=1e-06) f

The figure below shows a piston-cylinder assembly fitted with a spring of stiffness k = 29.7 N/m whose relaxed state occurs when the piston touches the left wall of the cylinder. The cylinder contains air and the spring is in a vacuum. The piston face, which has an area of 178 cm², is 99 cm from the left wall after being initially pressurized with air. During a hold, in which no additional air enters the assembly, a force f = 7.7 N is required as shown. After the hold, the piston is observed to move 22 cm to the right. Friction between the piston and cylinder is negligible. Cross-sectional Area, A P, T X air vacuum If 10.7 J of heat is transfered to the air, determine the change in the air's internal energy, AU, in J. U = number (rtol=0.05, atol=1e-06) f

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A piston and cylinder device contains 0.15 kg of water at 25◦C (state 1). As shown in the figure, the piston weighs 500 N and has a cross-sectional area of 0.01 m2. Atmospheric pressure is 100 kPa. Heat is transferred to the cylinder from a reservoir at 200◦C, raising the piston. When the piston touches the stops, the volume inside the cylinder is Vmax= 0.165 m^3 (state 2). Heat continues to be transferred until the control mass reaches the boundary temperature (state 3). Determine: a) The initial pressure of the water (kPa) b) The temperature (Celsius) when the piston hits the stops c) The total work (kJ) d) The total heat transfer (kJ) e) The total entropy production for the entire process (kJ/K)
Nitrogen gas is confined in a cylinder and the pressure of the gas is maintained by a weight placed on the piston. The mass of the piston and the weight together is 100 kg. The acceleration due to gravity is 9.81 m/s2 and the atmospheric pressure is 1.01325 bar. Assume frictionless piston. Determine: (a) The force exerted by the atmosphere, the piston and the weight on the gas if the piston is 200 mm in diameter. (b) The pressure of the gas. (c) If the gas is allowed to expand pushing up the piston and the weight by 500 mm, what is the work done by the gas in kJ? (d) What is the change in the potential energy of the piston and the weight after the expansion in part (c)?
A 70.0 g mass is hung from a coiled spring and it stretches 20.0 cm. It is then stretched an additional 35.0 cm and released. Find
There's a copper calorimeter container with the mass 0.2 kg and has 0.32 kg of H2O and also 0.036 kg of ice (thermal equilibrium at atm). If we drop 1.5 kg of lead at a temperature of 200 Celsius into calorimeter container, find the final temperature (in Celsius). Please show work Lead=131J/kgK Copper=390J/kg.K H2O = Cw = 4190 J/kg.K & LF = 3.34 x 105 J/kg
assuming that mass = 2150 kg K = 80.98 N/mm C =21.19 N/mm.
assuming that mass = 2150 kg K = 80.98 N/mm C =21.19 N/mm Please answer correctly please.
A weighted piston (total mass of 16.8 kg), resting on stops in a cylinder (radius of 0.05 m) divides a container into two regions. 0.075 kg of saturated liquid water at 50 °C is contained beneath the piston. The rest of the cylinder and container is evacuated. Heat is applied to the water until the piston is lifted off of the stops and moved a distance (y) of 0.6 m. As the piston reaches the mouth of the cylinder, the hermetic seal is broken and the cylinder contents can now expand to fill the remainder of the evacuated space. At this instant, no additional heat is added to or removed from the system. When the system fully equilibrates, its absolute pressure is measured to be 0.01 MPa. vacuum y (cc) BY-NC-SA Niel Crews. 2013 a) What is the state of the water when the piston begins to rise off of the stops? compressed liquid b) What is the water temperature when the piston reaches the mouth of the cylinder? 61.02432 °C c) What is the final volume of the water (after the seal is broken)?…
Which spring, the truncated cone spring or the helical spring, would have a larger spring constant? Explain.
A piston {cylinder device contains a gas at 1 bar absolute pressure occupying 1 m3 (state 1). At this state, the internal energy of the gas is 50 kJ. The gas is slowly compressed to an absolute pressure of 10 bar (state 2) such that PV = constant. During the compression process, an electric resistor within the cylinder receives a current of 8 A from an external battery of 6 V for a duration of 3 minutes. During compression process, 38.9 kJ of heat rejected from the gas. (a) Calculate total work (kJ) for the gas; (b) Determine the internal energy (kJ) of the gas at state 2.
Air is contained in a piston cylinder arrangement as shown in Fig.(Refer attachment). The piston can be assumed to be massless, frictionless, and perfectly insulated. 10 kg of dry ice (solid CO2) is placed on top of the piston. The initial conditions for air inside the cylinder are P1=121 kPa, T1= 300 K. Dry ice sublimates gradually, and its mass reduces to 5 kg. Ambient air is always at room temperature (27oC) and atmospheric pressure. (Given: R=287 J/kg ·K, g = 9.8 m/s2, CP/CV for air = 1.4; Neglect all heat transfer to the dry ice block.) a)Assuming the cylinder to be perfectly insulated, calculate the specific work done for the process. b)Assuming the cylinder to be perfectly conducting, what is the heat required per unit mass of air to complete the process? c) Plot the processes described in (a) and (b) together on a P-V diagram. From this plot, which process appears to have more work? Explain.
D D (18, 0, 9) A 12. P ********** 24 cm O 24 cm the Collar D weighing 10 N, which can slide freely on smooth rod in the xz plane, is held in equilibrium by a spring and force P which is parallel to the rod. Spring has a constant of 0.5 N/cm and its unstretched length is 10 cm. Determine the magnitude of force P required to maintain equilibrium. (Dimensions in cm.) k=0.5 N/cm Y C (12, 36,0)
In the piston-cylinder system shown in the figure, in the first state, the piston is located on the stoppers and the volume below it is 0.15 m3. There is 2 kg of water at a temperature of 40 oC in the cylinder. The cross-sectional area of the piston is 0.075 m2 and its mass is 35 kg. Atmospheric pressure is 100 kPa and gravitational acceleration is 9.76 m/s2. Then, heat is given to the water until it becomes dry saturated water vapor. Calculate the temperature of the water when the piston starts to move over the stoppers and the work done during the whole process.