Answered: 35 - What is the temperature of…

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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35 -

What is the temperature of refrigerant 134a with a pressure of 1400 kPa and an enthalpy of 308.34 kJ/kg?

80°C

63°C

NS)	– 17.77 °C

62.8°C

TO)

52.4°C

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30 - What is the pressure of refrigerant 134a with a temperature of –12.73 °C and a dryness of 0.816? a) 180 kPa B) 50 kPa NS) 168 kPa D) 454 kPa TO) 1273 kPa
31 - As the air is compressed in a compressor, its temperature is measured to rise from 22°C to 500°C. What is the work given to the compressor? a) 384.9 kJ/kg B) 438.6 kJ/kg NS) 484.2 kJ/kg D) 491.9 kJ/kg TO) 431.5 kJ/kg
19
38 - What is the specific volume of water with a temperature of 30°C and a pressure of 1 bar? O a) 4,2469 m³/kg O B) 0,79681 m³/kg NS) 0,001004 m²/kg O D) 5,2287 m/kg O TO) 0,001022 m2/kg
25 - The refrigerant R-134a enters a throttling valve as a saturated liquid at 1400 kPa and leaves at 240 kPa. Which of the following is the degree of dryness of R134a leaving the valve? a) 0.3434 B) 0.4075 NS) 0.4520 D) 0.3339 TO) 0.4297
5- According to the question in the figure H =? A) 600 N B) 2266,667 N C) 1666,667 N D) 1500 N E) 1000 N
39- According to the question in the figure H =? A) 2678 N B) 2678 kg C) 3348 kg D) 3508 kg E) 3348 N
5 - Air entering an adiabatic gas turbine with a mass flow of 42 kg/s, leaves the turbine with a specific volume of 1.2 m³/kg and a cross-sectional area of 0.85 m². What is the output velocity? a) 56.12 m/s B) 65.12 m/s NS) 66.69 m/s D) 69.29 m/s TO) 59.29 m/s
19 - Which of the following is the specific volume of refrigerant 134a at a pressure of 120 kPa and a temperature of – 24°C? a) 0,17395 m³/kg O B) 0,0007324 m/kg O NS) 0,0007297 m/kg O D) 0,0007620 m³/kg O TO) 0,16212 m²/kg
The water, initially at 300 kPa and 200°C, is closed.It is compressed isentropically to 8 MPa in a system.What is the final temperature of the water?
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35 - What is the temperature of refrigerant 134a with a pressure of 1400 kPa and an enthalpy of 308.34 kJ/kg? a) 80°C B) 63°C NS) – 17.77 °C D) 62.8°C TO) 52.4°C

35 -

What is the temperature of refrigerant 134a with a pressure of 1400 kPa and an enthalpy of 308.34 kJ/kg?