185647985 3. An electric heater of PkW, consisting of a thin plate, was placed between concrete and brick in a wall as shownin the figure. The heater surface area and the wall surface area are of the same size. The inner and outer sides ofthe wall are in contact with air.kooncrete = 1.5 w/mkKbrick = 0.75 w/mkh1 = 10 w/m?Kh2 = 40 w/m?KTo,1 = 25 °Ckstyroform = 0.04 w/mkhih2To,2 = -15 °CT,1T,2Last one digit of your P(kW) A(m²)student number1120010010014121314Thin electrical heater41558.16a) Show the heat transfer direction and temperature distribution on the figure.61771018b) The value of the electric heater power P is given in the table. Find the81119maximum temperature.1220BrickConcreteStyrofoamn67

Answered: Image /qna-images/answer/33b49554-261b-4d8b-866d-88edb5497ccb.jpg

3. An electric heater of PkW, consisting of a thin plate, was placed between concrete and brick in a wall as shown in the figure. The heater surface area and the wall surface area are of the same size. The inner and outer sides of the wall are in contact with air. kooncrete = 1.5 w/mk kbrick = 0.75 w/mk kstyroform = 0.04 w/mk hi = 10 w/m?K h2 = 40 w/m?K To,1 = 25 °C Tm,2 = -15 °C hi h2 To,1 T,2 Last one digit of your P(kW) A(m²) student number 3 11 200 100 100 1 4 12 13 6. 14 Thin electrical heater 4 7 15 8. 16 a) Show the heat transfer direction and temperature distribution on the figure. 9 17 7 10 18 b) The value of the electric heater power P is given in the table. Find the 11 19 maximum temperature. 9. 12 20 Brick Concrete Styrofoam

3. An electric heater of PkW, consisting of a thin plate, was placed between concrete and brick in a wall as shown in the figure. The heater surface area and the wall surface area are of the same size. The inner and outer sides of the wall are in contact with air. kooncrete = 1.5 w/mk kbrick = 0.75 w/mk kstyroform = 0.04 w/mk hi = 10 w/m?K h2 = 40 w/m?K To,1 = 25 °C Tm,2 = -15 °C hi h2 To,1 T,2 Last one digit of your P(kW) A(m²) student number 3 11 200 100 100 1 4 12 13 6. 14 Thin electrical heater 4 7 15 8. 16 a) Show the heat transfer direction and temperature distribution on the figure. 9 17 7 10 18 b) The value of the electric heater power P is given in the table. Find the 11 19 maximum temperature. 9. 12 20 Brick Concrete Styrofoam

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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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.

Question

185647985

3. An electric heater of PkW, consisting of a thin plate, was placed between concrete and brick in a wall as shown
in the figure. The heater surface area and the wall surface area are of the same size. The inner and outer sides of
the wall are in contact with air.
kooncrete = 1.5 w/mk
Kbrick = 0.75 w/mk
h1 = 10 w/m?K
h2 = 40 w/m?K
To,1 = 25 °C
kstyroform = 0.04 w/mk
hi
h2
To,2 = -15 °C
T,1
T,2
Last one digit of your P(kW) A(m²)
student number
11
200
100
100
1
4
12
13
14
Thin electrical heater
4
15
5
8.
16
a) Show the heat transfer direction and temperature distribution on the figure.
6
17
7
10
18
b) The value of the electric heater power P is given in the table. Find the
8
11
19
maximum temperature.
12
20
Brick
Concrete
Styrofoam
n67

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