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At what net rate does heat radiate from a $275-{m}^{2}$ black roof on a night when the roof's temperature is $30.0^{\circ} \mathrm{C}$ and the surrounding temperature is $15.0^{\circ} {C} ?$ The emissivity of the roof is $0.900 .$

$Q / t=2.1740 * 10^{+04} j$

Physics 101 Mechanics

Chapter 14

Heat and Heat Transfer Methods

Thermal Properties of Matter

Cornell University

Rutgers, The State University of New Jersey

University of Washington

Hope College

Lectures

04:16

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04:48

In mathematics, algebra is…

03:51

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01:01

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01:55

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(a) Cherry-red embers in a…

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A sphere of radius $0.500 …

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06:07

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05:58

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02:28

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$\cdot$ At a typical vent …

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03:24

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so to solve this question, we're going to use the formula for heat transfer rate is equal to Sigma, which is Steven Bozeman. Constant times area science. The M acidity and multiplied by, uh, food power of temperature minus the fourth power of temperature. They're so yes, this is surrounding temperature, and this is the temperature of a party. In this case, Stephen Woodsman Constant value is 5.67 times to empower negative eight on dhe ethnicities. 0.9 area is 2 75 It's a it's in a proper units. Animosities 0.9. But the temperature is not in proper units. All those the difference of temperature we should use to kill them because the temperature is to the power forward. So so two degrees Celsius means 303 to the food minus 15. Decree Celcius that is, to 88 too powerful. So let's do this. 3032 powerful minus to 88. How about four that is multiplied by 2 75 signs 0.9 times 5.67 So the answer here is 21,007 14 Jewish perceptions. So if you want to write in in terms of fourth power of 10. We can write it us and three significant digits. Then the answer is 2.17 times 10 power for what? Thank you.

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