4. A fluid at 850 kPa with a density of 4 kg/m3 and a velocity of 235 m/s, enters a device. Heat loss from the device by radiation is 42 kJ/kg. The work done by the fluid is 153 kJ/kg. The fluid exits at 124 kPa, 1.1 1 kg/m³and 265 m/s. Determine the change in specific internal energy.

4. A fluid at 850 kPa with a density of 4 kg/m3 and a velocity of 235 m/s, enters a device. Heat loss from the device by radiation is 42 kJ/kg. The work done by the fluid is 153 kJ/kg. The fluid exits at 124 kPa, 1.1 1 kg/m³and 265 m/s. Determine the change in specific internal energy.

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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Concept explainers

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

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4. A fluid at 850 kPa with a density of 4 kg/m3 and a velocity of 235 m/s, enters a device. Heat loss from the
device by radiation is 42 kJ/kg. The work done by the fluid is 153 kJ/kg. The fluid exits at 124 kPa, 1.1
kg/m³and 265 m/s. Determine the change in specific internal energy.
а. 287.3 kJ/kg
b. 203.3 kJ/kg
с. -232.1 kJkg
d. -102.7 kJ/kg

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