Physics: Aradiator has an emissivity of 0.7 and its exposed area is 1.2 m2. the temperature of the radiator is 850c and the surrounding temperature is 200c. what is the net heat flow rate from the radiator? ( = 5.67x10-8 w/m2k4)

Aradiator has an emissivity of 0.7 and its exposed

Ответ:

sheyunicorn

13.01.2022

To solve this problem it is necessary to apply the Stefan-Boltzmann equations. This equation describes the power radiated from a black body in terms of its temperature. Mathematically this can be expressed as,

$\frac{\Delta Q}{\Delta t} = e\sigma A(T_1^4-T_2^4)$

Where,

e= Emissivity

$\sigma$ = Stefan Boltzmann constant

A = Surface Area

$T_{1,2}$ = Temperature at each state

Replacing our values we have,

$\frac{\Delta Q}{\Delta t} = (0.7)(5.67*10^{-8})(1.2)([273+80]}}^4-[273+20]^4)$

$\frac{\Delta Q}{\Delta t} = 431.317W$

Therefore the neat heat flow rate from the radiator is 431.3W

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Ответ:

alexmiranda00

27.12.2020

Physics

Hello there, I dont think there is a way to change you age, but maybe you shall try again tomorrow and see if an error message pop up. If the Error Message pops up, contact custumaor support!

Glad I could Help!

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Aradiator has an emissivity of 0.7 and its exposed area is 1.2 m2. the temperature of the radiator is 850c and the surrounding temperature is 200c. what is the net heat flow rate from the radiator? ( = 5.67x10-8 w/m2k4)

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