Required informationProblem 04.037 - Energy balance for water in a piston-cylinder deviceAn insulated piston-cylinder device contains 4.500 L of saturated liquid water at a constant pressure of 175 kPa. Water isstirred by a paddle wheel while a current of 8 A flows for 45 min through a resistor placed in the water. One-half of theliquid is evaporated during this constant-pressure process and the paddle-wheel work amounts to 400 kJ.WH₂OP=constantWHProblem 04.037.a - Find source voltageDetermine the voltage of the source. Use data from the steam tables. (Round the final answer to two decimal places.)The voltage of the source isV.

To find the source voltage, we'll first need to calculate the total electrical energy supplied to…

Answered: Required information Problem 04.037 -…

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

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A piston cylinder assembly contains 19kg of water that executes four processes in series: • Process 1-->2: Constant pressure cooling from P1=20bar and T1=360°C to saturated vapor • Process 2-->3: Constant volume cooling to P3=5bar • Process 3-->4: Constant pressure heating to v4=0.5644m3/kg • Process 4-->5: Polytropic process following Pv =constant until P5=20bar A. Considering the water as the system, is the system best described as open, closed, or isolated? WHY? B. Sketch the series of processes on PT, Pv, and Tv diagrams. Include values on the P, T, and v axes. Indicate states with filled dots, processes with solid lines, and directions with arrows. C. Does this complete series of processes represent a thermodynamics cycle? EXPLAIN your reasoning. Answer parts A and C in the box below; upload part B as part of your response PDF.
During processing in a steel mill, a 375kg steel casting at 800 degrees is quenched by plunging it into a 500-gal oil bath, which is initially 75 degrees . After the casting cools and the oil bath warms , what is the final tempertature of the two? The weight per unit volume of the oil is 7.5 lb/gal.
2. Air is contained in a piston-cylinder assembly and is compressed between an initial and final state. For each of the following cases, determine whether it is possible for the process to occur adiabatically. If it can, determine the work per unit mass required for the process (use units appropriate for those provided in the process). If not, determine the direction of heat transfer (in/out of system). For the purposes of this problem, air can be modelled as an ideal gas. a. P1 = 1 bar, T = 27°C → P2 = 5 bar, T2 = 217°C b. P= 40 psi, T = 80°F → P2 = 150 psi, T2 =240°F
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A piston-cylinder device initially contains 0.8m3 of saturated water vapor at 250 kPa. At this state, the piston is resting on a set of stops, and the mass of the piston is such that a pressure of 300 kPa is required to move it. Heat is now slowly transferred to the steam until the volume doubles. a. Indicate knowns and unknows for each state as well as what type ofprocess is performed to get from one state to another. State anyassumptionsb. Determine the final temperaturec. Determine the work done during the processd. Show the process on a P-v diagram with respect to saturation linese. Determine the total heat transferred during this process
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A fluid is heated reversibly at a constant pressure of 1.05 bar until it has a specific volume of 0.1 m'/kg. It is then compressed reversibly according to a law pu = constant to a pressure of 4.2 bar, then allowed to expand reversibly according to a law pel.- constant, and is finally heated at constant volume back to the initial conditions. The work done in the constant pressure process is -515 N m, and the mass of fluid present is 0.2 kg. Calculate the net work of the cycle and sketch the cycle on a p-v diagram.
B2. The heat energy of 1605 kJ is supplied to saltwater in the steam generator to heat from 25°C to 104°C for the generation of water vapor, Take the density & specific heat of the solution as 1028 kg/m³ & 3 J/kg°K respectively. Determine the quantity of saltwater in the steam generator. I Solution: i) Change in Temperature (in K) ii) Mass of the saltwater (in kg) iii) Quantity (Volume) of salt water (in m³)
Refrigerant 134a undergoes a poly tropic process in a Piston- cylinder assembly from an initial state of saturale'a vapor at 2 bår to a final State of 12 bar and 80 °C. if the mass of the refrigerant is akg, Cal culate the work for the process 'in kJ using 's Signifigant Agures
Consider the following : 1. When a gas is heated at constant pressure, its temperature and volume both will increase 2. Volume V,-Vz 3. Change in heat transfer is equals to change in internal energy 4. The value of the work done is not zero Which of the above condition relates with isobaric process? Select one: O a. 1,2 and 4 only O b. 1, 2, 3 and 4 O C. 1,3 and 4 only O d. 1 and 4 only d anssad a
The frictionless piston and cylinder contain 1 kg of water. The initial pressure and volume are each pressure of 100kPa 0.25 m^3 (state 1). The system was gradually heated and when the volume of water in the cylinder became four times the initial volume (state 2), the piston was fixed and heating was continued until the water pressure reached 300 kPa (state 3). (1) Find the final temperature in the cylinder (2) Find work during this process (3) Find the amount of heat transfer during this process. Try to approximate this process on a P-v diagram.

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