Air is contained in a vertical piston-cylinder assembly fitted with an electrical resistor. The atmospheric pressure is 100 kPa and piston has a mass of 50 kg and a face area of 0.1 m² Electric current passes through the resistor, and the volume of air slowly increases by 0,045 n'. The mass of the air is 0.3 kg and its specific energy increases by 42.2 kJ/kg. g=9.8 m/s². Determine the heat transfer from the resistor to air for a system consisting, the air alone,

Air is contained in a vertical piston-cylinder assembly fitted with an electrical resistor. The atmospheric pressure is 100 kPa and piston has a mass of 50 kg and a face area of 0.1 m² Electric current passes through the resistor, and the volume of air slowly increases by 0,045 n'. The mass of the air is 0.3 kg and its specific energy increases by 42.2 kJ/kg. g=9.8 m/s². Determine the heat transfer from the resistor to air for a system consisting, the air alone,

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

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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Air is contained in a vertical piston-cylinder assembly fitted with an electrical resistor.
The atmospheric pressure is 100 kPa and piston has a mass of 50 kg and a face area of 0,1 m²
Electric current passes through the resistor, and the volume of air slowly increases by 0.045
m³. The mass of the air is 6.3 kg and its specific energy increases by 42.2 kJ/kg, &-9.8 m/s
Determine the heat transfer from the resistor to air for a system consisting, the air alone,

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