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vodomira [7]
1 year ago
14

How could angela use the puzzle to model semiconductors? as an n-type semiconductor with the pegs representing electrons and the

holes representing positive charges as an n-type semiconductor with the holes representing electrons and the pegs representing positive charges as a p-type semiconductor with the pegs representing electrons and the holes representing positive charges as a p-type semiconductor with the holes representing electrons and the pegs representing positive charges
Engineering
1 answer:
bogdanovich [222]1 year ago
7 0

Angela can use the puzzle to model semiconductors as option C.  a p-type semiconductor with the pegs representing electrons and the holes representing positive charges.

<h3>What is semiconductor and its example?</h3>

A semiconductor is known to be any substance that is said to be one that has some specific electrical properties that helps it to be able to act as  the framework for computers and other kind of electronic devices.

Note that some examples of semiconductors are said to be silicon, germanium, and other elements such as metalloid staircase" that is shown on a periodic table.

Therefore, Angela can use the puzzle to model semiconductors as option C.  a p-type semiconductor with the pegs representing electrons and the holes representing positive charges.

Learn more about semiconductor from

brainly.com/question/9250618

#SPJ1

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A double-pane insulated window consists of two 1 cm thick pieces of glass separated by a 1.8 cm layer of air. The window measure
Elanso [62]

Answer:

(b). T = 22.55 ⁰C

(c). q = 557.8 W

Explanation:

we take follow a step by step process to solving this problem.

from the question, we have that

The two glass pieces is separated by a 1.8 cm distance layer of air.

the thickness of glass piece is 1 cm

width = 4 m

the height = 3 m

(a). the sketch of the thermal circuit is uploaded in the picture below.

(b).  the thermal resistance due to the conduction in the first glass plane is given thus;

R₁ = Lg / Kg A ................(1)

given that Kg rep. the thermal conductivity of the glass plane

A = conduction surface area

Lg = Thickness of glass plane4

taking the thermal conductivity of glass plane as Kg = 0.78 w/mk

inputting values into equation (1) we have,

R₁ = [1 (cm) ˣ 1 (m)/100 (cm)] / [(0.78 w/mk)(4m ˣ 3m)]

R₁ = 1.068 ˣ 10 ⁻³ k/w

Being that we have same thermal resistance in the first and second plane,

therefore R₁ = R₃ = 1.068 ˣ 10 ⁻³ k/w

⇒ Also the thermal resistance between air and glass as a result of the conduction by the layer is given thus

R₂ = La/KaA .....................(2)

given Ka = thermal conductivity of air

A = surface area

La = thickness of air

substituting values into the equation we have

R₂ = [1.8 (cm) ˣ 1 (m)/100 (cm)] / [(0.0262 w/mk)(4m ˣ 3m)]

R₂ = 5.73 ˣ 10⁻² k/w

Given the thermal resistance on the outer surface due to convection, we have

R₄ = 1/hA

inputting value gives R₄ = 1 / (12 w/m² ˣ 12m) = 6.94 ˣ 10⁻³k/w

R₄ = 6.94 ˣ 10⁻³k/w

Finally the sum total of thermal resistance = R₁ + R₂ + R₃ + R₄

R-total = 0.0663 kw

From this we can calculate the rate of heat loss

using  q = Ti - To / R-total ..............(3)

given Ti and To is the inside and outside temperature i.e. 27⁰C and -10⁰C

from equation (3),

q = 27- (-10) / 0.0063 = 557.8 W

q = 557.8 W  

⇒ Applying the heat transfer formula for inside surface glass temperature gives;

q = Ti - T₂ / R₃ + R₄

T₂ = Ti - q (R₃ + R₄)

T₂ = 27 - 557.8 (1.068ˣ10⁻³ + 6.94ˣ10⁻³ ) = 22.55°C

T₂ = 22.55°C

cheers i hope this helps

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Answer:

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