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Mazyrski [523]
4 years ago
5

Consider a 20 cm thick granite wall with a thermalconductivity of 2.79 W/m·K. The temperature of the leftsurface is held constan

t at 50°C, whereas the right face isexposed to a flow of 22°C air with a convection heat transfercoefficient of 15 W/m2·K. Neglecting heat transfer by radiation, find the right wall surface temperature and the heat fluxthrough the wall.
Physics
1 answer:
zysi [14]4 years ago
8 0

Answer:

Q= 231.88 W/m²

Explanation:

Given that

L= 20 cm

K= 2.79 W/m·K

T₁=50°C

T₂= 22°C

h=15 W/m₂·K

The total thermal resistance

R=\dfrac{L}{KA}+\dfrac{1}{hA}

Now by putting the values

R=\dfrac{L}{KA}+\dfrac{1}{hA}

R=\dfrac{0.2}{2.79A}+\dfrac{1}{15A}

R= 0.138  K/W      ( for heat flux A= 1 m²)

Heat flux Q= ΔT/R

Q= (50-22)/0.138 = 32/0.138 W

Q= 231.88 W/m²

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From the given information in the question, the correct option is Option 1: 14 cm.

A non-stretched elastic spring has a conserved potential energy which gives it the ability to perform work. The elastic potential energy can be expressed as:

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i. Given that: PE = 10 J and x = 10 cm, then;

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PE = \frac{1}{2} k x^{2}

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x = \sqrt{200}

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So that;

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For more information, check at: brainly.com/question/1352053.

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