In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Assume that the person is wearing only a skimpy bathing suit of negligible area. As a rough approximation, the area of a human body may be considered to be that of the sides of a cylinder of length L=2.0m and circumference C=0.8m. For the Stefan-Boltzmann constant use σ=5.67×10−8W/m2/K4.Part aIf the surface temperature of the skin is taken to be Tbody=30∘C, how much thermal power Prb does the body described in the introduction radiate?Take the emissivity to be e=0.6.Express the power radiated into the room by the body numerically, rounded to the nearest 10 W. part bFind Pnet, the net power radiated by the person when in a room with temperature Troom=20∘C

The thermal power emitted by the body is

The net power radiated is  

Explanation:

From the question we are told that

   The length of the assumed human body is  L =  2.0 m

   The circumference of the assumed human body is  

   The  Stefan-Boltzmann constant is  

    The temperature of skin

     The temperature of the room is  

    The emissivity is  e=0.6

The thermal power radiated by the body is mathematically represented as

substituting value

The net power radiated by the body is mathematically evaluated as

Where A is the surface area of the body which is mathematically evaluated as

substituting values

=>    

=>  

scorpions are,

c.arachnids

  scorpions are animals in the order scorpiones, under the class arachnida, which makes them a distant cousin of spiders

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