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kozerog [31]
2 years ago
14

01.04 Law of Conservation of Energy science question

Physics
1 answer:
mojhsa [17]2 years ago
5 0

Answer:

 law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time.

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The concrete slab of a basement is 11 m long, 8 m wide, and 0.20 m thick. During the winter, temperatures are nominally 17 C and
Lunna [17]

Answer:

Q = - 4312 W = - 4.312 KW

Explanation:

The rate of heat of the concrete slab can be calculated through Fourier's Law of heat conduction. The formula of the Fourier's Law of heat conduction is as follows:

Q = - kA dt/dx

Integrating from one side of the slab to other along the thickness dimension, we get:

Q = - kA(T₂ - T₁)/L

Q = kA(T₁ - T₂)/t

where,

Q = Rate of Heat Loss = ?

k = thermal conductivity = 1.4 W/m.k

A = Surface Area = (11 m)(8 m) = 88 m²

T₁ = Temperature of Bottom Surface = 10°C

T₂ = Temperature of Top Surface = 17° C

t = Thickness of Slab = 0.2 m

Therefore,

Q = (1.4 W/m.k)(88 m²)(10°C - 17°C)/0.2 m

<u>Q = - 4312 W = - 4.312 KW</u>

<u>Here, negative sign shows the loss of heat.</u>

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3 years ago
List the 4 things technology can be.
inessss [21]

Technology can be the four things listed below...

  • Phones
  • Computers
  • TVs
  • Playstation or Xbox
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3 years ago
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What is the Deepest point of the ocean and where is it?
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Answer:

marinas trench in Pacific Ocean

<h2><em>mark </em><em>it </em><em>as</em><em> </em><em>brainliest</em></h2>
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3 years ago
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Who created the light bulb?
Daniel [21]
There were 2 people
Tomas Edison
Joseph Swan

Tomas Edison invented the first practical incandescent lightbulb.

Sir Joseph Swan is most famous for his role in the development of the first incandescent lightbulb.


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alukav5142 [94]

Answer:

b

Explanation:

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