Q1/ A 80 kg man at 37°C walks under sunrays, drinks 1 kg water at 3°C, the increase in the thermal energy of his body due walking is 31 kJ, he lost heat from sweating by 95 kJ, and his final temperature with the water he drank is 39.5°C. The average specific heat of the human body and water are 3.6 kJ/kg°C and 4.2 kJ/kg°C respectively. Find the heat added to him because of exposing to the sunrays.

Q1/ A 80 kg man at 37°C walks under sunrays, drinks 1 kg water at 3°C, the increase in the thermal energy of his body due walking is 31 kJ, he lost heat from sweating by 95 kJ, and his final temperature with the water he drank is 39.5°C. The average specific heat of the human body and water are 3.6 kJ/kg°C and 4.2 kJ/kg°C respectively. Find the heat added to him because of exposing to the sunrays.

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

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.

Question

Q1/ A 80 kg man at 37°C walks under sunrays, drinks 1 kg
water at 3°C, the increase in the thermal energy of his body
due walking is 31 kJ, he lost heat from sweating by 95 kJ, and
his final temperature with the water he drank is 39.5°C. The
average specific heat of the human body and water are 3.6
kJ/kg°C and 4.2 kJ/kg°C respectively. Find the heat added to
him because of exposing to the sunrays.

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