a spherical asteroid with radius of 1.20 km is floating in deep space. it has an emissivity of 0.70 and a temperature of -212° C. estimate the rate at which it looses energy due to radiation
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a spherical asteroid with radius of 1.20 km is floating in deep space. it has an emissivity of 0.70 and a temperature of -212° C. estimate the rate at which it looses energy due to radiation
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- Thank you! Required info: A student in a lecture hall has 0.310 m^2 of skin (arms, hands, and head) exposed. The skin is at 34.0°C and has an emissivity of 0.970. The temperature of the room is 20.2°C (air, walls, ceiling, and floor all at the same temperature). The Stefan-Boltzmann constant is 5.670 x 10-8 W/ (m2. k4). a) what is the net rate of heat flow from the body due to thermal radiation? b) compare this to the total rate of heat flow from the body, which is about 100 W.An object having a fixed emissivity of ε = 0.725 radiates heat at a rate of 10 W when it is at an absolute temperature T. If its temperature is doubled to 2T, at what rate will it now radiate? a)160W b)320W c)40W d)80W e)5WOn a hot summer day, a student turns his fan on when he leaves his room in the morning. When he returns in the evening, will the room be warmer or cooler than the neighboring rooms. Explain the answer. Assume that all the doors and windows are kept closed.
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