A reversible process in a piston/cylinder is shown in the figure below. Which of the below options are correct? - a) U₂U₁ <0, 1W₂ > 0, 192 < 0 192 > 0 b) u₂u₁ > 0, 1W2 < 0, - 192 = 0 c) U₂U₁ > 0, 1W₂ < 0, d) U₂u₁ > 0, 1W₂ = 0, 192 > 0 e) U₂U₁ <0,W₂ > 0,192 = 0 IN TAK 2

A reversible process in a piston/cylinder is shown in the figure below. Which of the below options are correct? - a) U₂U₁ <0, 1W₂ > 0, 192 < 0 192 > 0 b) u₂u₁ > 0, 1W2 < 0, - 192 = 0 c) U₂U₁ > 0, 1W₂ < 0, d) U₂u₁ > 0, 1W₂ = 0, 192 > 0 e) U₂U₁ <0,W₂ > 0,192 = 0 IN TAK 2

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

b) For a simple Rankine cycle (10 points)1- If there were no superheat in the cycle, how many properties are required to solve the cycle?2- If there is superheat in the cycle, how many properties are required to solve the cycle
11.) A heat engine with &=0.450 operates between two heat reservoirs at 300K and 700K. During each cycle of operation the engine takes in 200J of heat from the 700K reservoir. Th a) Find the magnitudes of the Wk, Qh, and Qc for one cycle of operation of the engine. b) Draw the energy flow diagram for one cycle of operation on a figure like the one shown to the right. Show an arrow and the value from part a) for: Wk, Qh, and Qc. c) Is this engine real, reversible, or impossible. Explain why. Engine Te
P4.22). A single-cylinder four-stroke-cycle spark-ignition engine operating at 3500 rpm has a brake mean effective pressure of 1800 kPa and a displacement of 400 cm'. Atmospheric conditions are 101 kPa and 27°C. a) If the stroke is 6 cm, what is the bore? b) What is the brake power? c) If the mass air-fuel ratio is 16 and the fuel flow rate is 0.00065 kg/s, what is the volumetric efficiency? d) Compare your results with the performance of a two-cylinder engine with the same overal l geometric characteristics.
Problem 1) Rankine Cycle Analysis Consider a simple Rankine cycle, steam power plant. The state points are defined in the schematic and the operating conditions are given in the Table la. The steam flow rate is 137.4 lbm/s. You may use "EES," but supply your code. a) Provide a quantitative T-s diagram including all state points, lines of constant pressure, and the "dome." b) Determine all the energy quantities and complete Table 1b. Discuss the value of the quality at state 4. c) Determine all the exergy quantities and complete Table 1c. Assume the dead state temperature is 77°F and the dead state pressure is 14.7 psia. d) Discuss your results. What additional insights does the exergy analysis provide? 3 Quoiler 4 Fuel State 1 2 3 4 State 1 2 3 4 State br (Btu/lbm) 1 ? 2 ? Boiler ? ? Table 1a: State Points and Other Items T (°F) p (psia) Variable ? 0.71 XI ? 700 turbine 1057 700 pump ? 0.71 boiler T (°F) p (psia) ? 0.71 Turbine ? 1057 ? Condenser Table 1b: Energy Results 700 700 0.71 W…
B A 10m y 6m C 8m 6m D Figure 1: Schematic diagram of task 1. 5 Part C Suppose that a turbine is installed before the pipeline exit to produce electricity. If the used turbine converts only three-quarters of the energy that the fluid will lose after passing through the turbine, what is the efficiency of this turbine? - Identify the most common water turbines and the limitations that exist within these different types? - Although hydraulic turbines considered one of the most efficient power plants, their ecological impact is a big concern. Discuss this issue and suggest remedies for such problems by writing a short paragraph?
7) Consider a cycle with n moles of diatomic gas illustrated in the PV diagram below. Assume the gas is ideal and that AB is an isotherm. a) Complete the chart below in terms of n, R, Temperature and Volume. b) Determine the efficiency. c) Find the Carnot efficiency for a cycle operating between these temperatures. P Isotherm B. C V V. AEint Qin WBy АВ BC СА cycle
Q 03: A) What are the major pollutants from the exhaust of SI and CI engines. B) What is the fact that at some speed the volumetric efficiency of an engine is maximum, however it decreases gradually at the start and end.
1. Using the Steam Tables, determine the heat absorbed by the boiler (KW) and Wsf when subcooled water at pressure = 5 Mpaa (subcooled by 64 deg C measured at the boiler inlet), is superheated to 100 degrees SH at the same pressure. Flow rate is at 10 cubic meters per minute. Ans.: a) Qa = b)Wsf= Hint: Use v at compressed water temp. at boiler inlet to convert to mass flow rate. Process is isobaric (Constant Pressure, where Q=m x AH).
34 - Helium enters a continuous flow compressor at 326 K and leaves at 441 K. If the mass flow rate is 1.5 kg/s, which of the following is the required power? (Cp = 5.1926 kJ/kgK) a) 988.7 kW B) 895.7 kW NS) 617.9 kW D) 927.9 kW TO) 836.0 kW
Determine the amount of work required to compressed 1.5 kg of air at a pressure of 7 barg. The isentropic index is 1.2 and the air intake is at 1 bar, 20C & RH =65%. i) Find the temperature at the end of the compression. ii) Represent the above process on a p‐v diagram. iii) If the isentropic efficiency is 65%, find the indicated or real work. iv) Find the shaft work needed if the mechanical efficiency is 75%.
You have a tank that is 0.01 m^3 and is initially evacuated. You then hook this up to a line that supplies N2 at a pressure of P_1 = 5 bar and a T_1 = 350 K. The tank fills adiabatically (you can assume there is no heat flow to the walls of the tank), and the filling ends when no more N2 flows into the tank. Find a) the final pressure of the gas in the tank, and b) the final temperature of the gas in the tank. You can assume N2 is an ideal gas with a CP* = 29 J/mol K. NOTE: Mainly I am confused on how the evacuated tank factors into the work for b). What I did was use the ideal gas formula to find a value for N2*T2 (601.395) but I am no longer certain how to continue in the work. I was assuming the practice question had meant the temperature of the tank was 0 initially but it leads to a negative mole value. For a) I got 5 bar, arguing the flow would stop when the pressure of tank and line are equal
If the frequency of the pump is halved, what will happen to the power consumed? P0 = initial power consumption A. 1/8 P initial B. 2 P initial C. 1/4 P initial D. 4 P initial