3.1 A 4L jug of milk at 25°C is placed in your refrigerator where it is cooled down to 5°C. The high temperature in the Carnot refrigeration cycle is 45°C and the properties of milk are the same as for liquid water. Find the amount of energy that must be removed from the milk and the additional work needed to drive the refrigerator. 3.2 An inventor claims claims to have devised a cyclical engine for use in space vehicles that operates with a nuclear-fuel-generated energy source whose temperature is 510 K and a sink at 270 K that radiates waste heat to deep space. He also claims that this engine produces 4.1 kW while rejecting heat at a rate of 15000 kJ/h. Is this claim valid?
3.1 A 4L jug of milk at 25°C is placed in your refrigerator where it is cooled down to 5°C. The high temperature in the Carnot refrigeration cycle is 45°C and the properties of milk are the same as for liquid water. Find the amount of energy that must be removed from the milk and the additional work needed to drive the refrigerator. 3.2 An inventor claims claims to have devised a cyclical engine for use in space vehicles that operates with a nuclear-fuel-generated energy source whose temperature is 510 K and a sink at 270 K that radiates waste heat to deep space. He also claims that this engine produces 4.1 kW while rejecting heat at a rate of 15000 kJ/h. Is this claim valid?
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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Transcribed Image Text:3.1
A 4L jug of milk at 25°C is placed in your refrigerator where it is cooled down to 5°C.
The high temperature in the Carnot refrigeration cycle is 45°C and the properties of
milk are the same as for liquid water. Find the amount of energy that must be removed
from the milk and the additional work needed to drive the refrigerator.
3.2
An inventor claims claims to have devised a cyclical engine for use in space vehicles
that operates with a nuclear-fuel-generated energy source whose temperature is 510
and a sink at 270 K that radiates waste heat to deep space. He also claims that this
engine produces 4.1 kW while rejecting heat at a rate of 15000 kJ/h. Is this claim
valid?
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