Two containers A and B of volume V are connected by a thin tube. A cock is equipped in the thin tube, and is closed initially. A gas of a pressure P and a temperature T is contained in the container A, and a gas of a pressure 2P and a temperature 37 is contained in the container B. Exchange of thermal energies between the gas and the containers may be ignored. The volume of the thin tube may be ignored. The gas may be considered as an ideal gas composed of monatomic molecules. The universal gas constant is denoted as R. Answer the following questions. A 2P 3T B++ PT V Fig. 4 V

Two containers A and B of volume V are connected by a thin tube. A cock is equipped in the thin tube, and is closed initially. A gas of a pressure P and a temperature T is contained in the container A, and a gas of a pressure 2P and a temperature 37 is contained in the container B. Exchange of thermal energies between the gas and the containers may be ignored. The volume of the thin tube may be ignored. The gas may be considered as an ideal gas composed of monatomic molecules. The universal gas constant is denoted as R. Answer the following questions. A 2P 3T B++ PT V Fig. 4 V

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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1. Humans are able to control their rates of heat production and heat loss to maintain a nearly constant core temperature of Te = 37°C under a wide range of environmental conditions. This process is called thermoregulation. From the perspective of calculating heat transfer between a human body and its surroundings, we focus on a layer of skin: fat, with its outer surface exposed to the environment and its inner surface at a temperature slightly less than the core temperature, T = 35°C = 308 K. Consider a person with a skin/fat layer of thickness L = mm and effective thermal conductivity k = 0.3 "- The person has a surface area A = 1.8 m? and is dressed in a bathing suit. The m· K emissivity of the skin is ɛ = 0.95. a). When the person is in still air at T = 282 K, what is the skin surface temperature and rate of heat loss to the environment? Convection heat transfer to the air is characterized by a free convection coefficient of h 2 m2 -K b). When the person is in water at T = 282,…
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