Part DAssume the heat is now off in the room, after a very long time the temperature in the room will be,O 20°C,greater than 20°C,lower than 20°CSubmitRequest AnswerPart EAssume the heat is off in the room and the room is sealed with the number of moles of air staying the same.If the room has a volume of 1m and initially at a pressure of 1 x 10° Pa with a temperatureof 20°C, the final pressure in the room after a very long time will be,less than 1 x 10° Pa.O 1x 10° Pa.greater than 1 x 105 Pa. The thermal conductivities of wood is kwood = 0.1W/(m°C)and air is kair = 0.0234W/(m°C).Part AIf the temperature of the room is 20°C and outside is 10°C,find the rate of heat flow for a wall of wood with area = 10 m² and thickness of 5cm.O 60 WO 304 WO 34 WO 200 WO 100 WSubmitRequest AnswerPart BThe wall of wood with thickness of 5cm is now replaced with two layers of woodand a gap of air between the wood. Each layer of wood has a 2.5cm thickness and the gap is 1cm.The rate of heat flow will,decreases.increases.stay the same.SubmitRequest AnswerPart CThe temperature in the air gap will be,O 20°C,between 10°C and 20°C,O 10°C,

Answered: Image /qna-images/answer/637a8ff8-79d5-425c-89e7-dda61e837d22.jpg

Part A If the temperature of the room is 20°C and outside is 10°C, find the rate of heat flow for a wall of wood with area = 10 m² and thickness of 5cm. O 60 W O 304 W O 34 W O 200 W O 100 W Submit Request Answer Part B The wall of wood with thickness of 5cm is now replaced with two layers of wood and a gap of air between the wood. Each layer of wood has a 2.5cm thickness and the gap is 1 The rate of heat flow will, decreases. increases. stay the same. Submit Request Answer Part C The temperature in the air gap will be, 20°C, O between 10°C and 20°C, O 10°C,

Part A If the temperature of the room is 20°C and outside is 10°C, find the rate of heat flow for a wall of wood with area = 10 m² and thickness of 5cm. O 60 W O 304 W O 34 W O 200 W O 100 W Submit Request Answer Part B The wall of wood with thickness of 5cm is now replaced with two layers of wood and a gap of air between the wood. Each layer of wood has a 2.5cm thickness and the gap is 1 The rate of heat flow will, decreases. increases. stay the same. Submit Request Answer Part C The temperature in the air gap will be, 20°C, O between 10°C and 20°C, O 10°C,

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

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

Part D
Assume the heat is now off in the room, after a very long time the temperature in the room will be,
O 20°C,
greater than 20°C,
lower than 20°C
Submit
Request Answer
Part E
Assume the heat is off in the room and the room is sealed with the number of moles of air staying the same.
If the room has a volume of 1m and initially at a pressure of 1 x 10° Pa with a temperature
of 20°C, the final pressure in the room after a very long time will be,
less than 1 x 10° Pa.
O 1x 10° Pa.
greater than 1 x 105 Pa.

The thermal conductivities of wood is kwood = 0.1W/(m°C)and air is kair = 0.0234W/(m°C).
Part A
If the temperature of the room is 20°C and outside is 10°C,
find the rate of heat flow for a wall of wood with area = 10 m² and thickness of 5cm.
O 60 W
O 304 W
O 34 W
O 200 W
O 100 W
Submit
Request Answer
Part B
The wall of wood with thickness of 5cm is now replaced with two layers of wood
and a gap of air between the wood. Each layer of wood has a 2.5cm thickness and the gap is 1cm.
The rate of heat flow will,
decreases.
increases.
stay the same.
Submit
Request Answer
Part C
The temperature in the air gap will be,
O 20°C,
between 10°C and 20°C,
O 10°C,

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