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A piston-cylinder system contains R-134a as shown in the figure. Two linear springs with the same spring constant but different lengths are installed above the frictionless piston. Initially (state 1) the piston is motionless and floating so that the top of the piston is 2 cm from the bottom of Spring 1 and 5 cm from the bottom of Spring 2. In this initial state the R-134a has a temperature of T, = -20°C and a quality of 70%. Heat is added to the system causing the piston to rise until it just touches Spring 1, but Spring 1 exerts no force on the piston. In this state (state 2), the R-134a has a volume V2 = 30 L. Heating continues until the temperature reaches T3 = 50 °C and Spring 1 is compressed until the piston just touches Spring 2, but Spring 2 exerts no force on the piston (State

A piston-cylinder system contains R-134a as shown in the figure. Two linear springs with the same spring constant but different lengths are installed above the frictionless piston. Initially (state 1) the piston is motionless and floating so that the top of the piston is 2 cm from the bottom of Spring 1 and 5 cm from the bottom of Spring 2. In this initial state the R-134a has a temperature of T, = -20°C and a quality of 70%. Heat is added to the system causing the piston to rise until it just touches Spring 1, but Spring 1 exerts no force on the piston. In this state (state 2), the R-134a has a volume V2 = 30 L. Heating continues until the temperature reaches T3 = 50 °C and Spring 1 is compressed until the piston just touches Spring 2, but Spring 2 exerts no force on the piston (State

Elements Of Electromagnetics
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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Calculate the Pressure, P3, of the R-134a in state 3.

A piston-cylinder system contains R-134a as shown in the figure. Two linear springs with the same spring constant but different lengths are installed above the frictionless piston. Initially (state 1) the piston is motionless and floating so that the top of the piston is 2 cm from the bottom of Spring 1 and 5 cm from the bottom of Spring 2. In this initial state the R-134a has a temperature of T, = -20°C and a quality of 70%. Heat is added to the system causing the piston to rise until it just touches Spring 1, but Spring 1 exerts no force on the piston. In this state (state 2), the R-134a has a volume V2 = 30 L. Heating continues until the temperature reaches T3 = 50 °C and Spring 1 is compressed until the piston just touches Spring 2, but Spring 2 exerts no force on the piston (State 3). Heating continues again, compressing both springs until a final pressure is reached (state 4) of P4 = 190 kPa. The cross-sectional area of the piston is 0.3 m?. Calculate the spring constant, k, in kN/m. Spring 2 Spring 1 h2 h, Piston he R-134a
Transcribed Image Text:A piston-cylinder system contains R-134a as shown in the figure. Two linear springs with the same spring constant but different lengths are installed above the frictionless piston. Initially (state 1) the piston is motionless and floating so that the top of the piston is 2 cm from the bottom of Spring 1 and 5 cm from the bottom of Spring 2. In this initial state the R-134a has a temperature of T, = -20°C and a quality of 70%. Heat is added to the system causing the piston to rise until it just touches Spring 1, but Spring 1 exerts no force on the piston. In this state (state 2), the R-134a has a volume V2 = 30 L. Heating continues until the temperature reaches T3 = 50 °C and Spring 1 is compressed until the piston just touches Spring 2, but Spring 2 exerts no force on the piston (State 3). Heating continues again, compressing both springs until a final pressure is reached (state 4) of P4 = 190 kPa. The cross-sectional area of the piston is 0.3 m?. Calculate the spring constant, k, in kN/m. Spring 2 Spring 1 h2 h, Piston he R-134a
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