14. During the summer the lempera temperature is a constant 95 F. When the driver gets into the van, she turns on the air conditioner with the thermostat set at 60'F. If the time constant for the van is 1/K, = hr, when will the temperature inside the van reach 80 F?

14. During the summer the lempera temperature is a constant 95 F. When the driver gets into the van, she turns on the air conditioner with the thermostat set at 60'F. If the time constant for the van is 1/K, = hr, when will the temperature inside the van reach 80 F?

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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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

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14. During the summer the temperature inside a van reaches 130 F while the outside
temperature is a constant 95 F. When the driver gets into the van, she turns on the air
conditioner with the thermostat set at 60F If the time constant for the van is 1/K, =
hr, when will the temperature inside the van reach 80 F?

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