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Temperature Assignment | Professional Writing Services

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March 19th, 2020

I Review I Constants Learning Goal: To understand the formula for power radiated in the form of electromagnetic energy by an object at nonzero temperature. Request Answer Submit Every object at absolute (Kelvin) temperature T will radiate electromagnetic waves. This radiation is typically in the infrared for objects at room temperature, with some visible light emitted for objects heated above 1000 K. The formula governing the rate of energy radiation from a surface is given by Part D As a rough approximation, the human body may be considered to be a cylinder of length L = 2.0 m and circumference C = 0.8 m.

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(To simplify things, ignore the circular top and bottom of the cylinder, and just consider the cylindrical sides.) If the emissivity of skin is taken to be e = 0.6, and the surface temperature is taken to be T = 30°C, how much thermal power P does the human body radiate? P= eσATΤΑ, Express the power radiated numerically; give your answer to the nearest 10 W. where P is the thermal power (also known as the heat current H). • View Available Hint(s) Hν ΑΣφ P = Submit I Review I Constants Learning Goal: Part A To understand the formula for power radiated in the form of electromagnetic energy by an object at nonzero temperature. This formula applies to Every object at absolute (Kelvin) temperature T will radiate electromagnetic waves. This radiation is typically in the infrared for objects at room temperature, with some visible light emitted for objects heated above 1000 K. The formula governing the rate surface is given by O any object of total surface area A, Kelvin temperature T, and emissivity e O any object of cross-sectional area A, Kelvin temperature T, and emissivity e O any object of total surface area A, Kelvin temperature T, and emissivity o f energy radiation from a O any object of cross-sectional area A, Kelvin temperature T, and emissivity o P = eo AT4, where P is the thermal power (also known as the heat current H) Request Answer Submit Part B If you wanted to find the area of the hot filament in a light bulb, you would have to know the temperature (determinable from the color of the light), the power input, the Stefan-Boltzmann constant, and what property of the filament? O thermal radiation O emissivity O length

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