Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Define the Energy change, Energy at final state, Energy at initial state?
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- 2. A piston-cylinder assembly with stops (see figure) contains 1.54 kg of water initially occupying a volume of 1.25 m at a pressure of 1 bar (State 1). As the water in the assembly is heated, the pressure and temperature in the system remain constant until the piston contacts the stops. In this position (State 2), the quality, x2, is determined to be 92%. Heat continues to be added to the system at a constant volume until the system reaches a pressure of 1.5 bar (State 3). Determine the following quantities: а. X b. V2 (m2) C. W13 (kJ) d. Qu (kJ) e. Plot the results on a P-v diagram, labelling relevant P, T, and v values.arrow_forwardEither solve all parts or leave it unsolved ... I vll upvotearrow_forward3. Air is contained within a piston-cylinder assembly The cross sectional area of the piston is 0.01 m². Initially the piston is at 1 bar and 25°C, 10 cm above the base of the cylinder. In this state, the spring exerts no force on the piston. The system is then reversibly heated to 100°C. As the spring is compressed, it exerts a force on the piston according to: F=-kx where k= 50,000 N/m and x is the displacement length from its uncompressed position. Determine the work done. a. -166 J b. -216 J c. 166 J d. 216 Jarrow_forward
- 2.arrow_forwardawuIs 2 kg of air undergoes a power cycle undergocs a power cycle consisting of the following processes: Process 1-2: Constant-temperature expansion from p, = 4 bar, v, = 1 m³ /kg, to p2 = 2 bar, v2 = 2 m3/kg. Process 2-3: Constant-pressure compression to T3 = 696.9 K. Process 3-1: Constant-volume heating to state 1. Assume ideal gas behavior and neglect kinetic and potential energy effects. Show that T; = 1393.7 K and find T Sketch the cycle on a T-v diagram and label the states. Find the work done and heat transferred during cach process to complete this chart: b C. Process W (kJ) Q (kJ) iti 1-2 2-3 3-1 TOTAL Find the thermal efficiency of the cycle. For an energy balance on the entire cycle (1-2-3-1), what should the change in system energy be? Does that hold in this case? Add a Caption Pedro Castaño shared with you > Wednesday • Feb 23, 2022•7:24 PM Adjust IMG_7188 Apple iPhone 12 Pro Max НEIF Wide Camera – 26 mm f1.6 3 MP • 1914 × 1728 • 3.5 MB iarrow_forward
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