Assume that the total surface area of a human body is $1.6 m^{2}$ and that it radiates like as ideal radiator . calculate the amount of energy radiated per second by the body if the body temperature is $37^{0} C$ .stefan constant $α i s 6.0 \times 10^{- 8} W m^{- 2} K^{- 4}$

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Solution

$A = 1.6 m^{2}$
$T = 37^{0} C = 310 K$
$σ = 6.0 \times 10^{- 8} w / m^{2} - k^{4}$
energy radiated per second is:
$A σ T^{4} = 1.6 \times 6 \times 10^{- 8} (310)^{4} = 8865801 \times 10^{- 4} = 886.58 = 887 J$

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Assume that the total surface area of a human body is 1.6 $m^{2}$ and that it radiates like an ideal radiator. Calculate the amount of enrgy radiated per second by the body if the body temperature is $37^{0}$ C. Stefan constant $σ$ is $6.0 \times 10^{- 8} W m^{- 2} K^{- 4}$ .

Q. Assume that the total surface area of a human body is

1.6 m^{2}

and that it radiates like an ideal radiator. Calculate the amount of energy radiated per second by the body if the body temperature is

37^{\circ} C

.

Stefan constant

= 6.0 \times 10^{- 8} W m^{- 2} K^{- 4}

Assume that the total surface area of a human body is 1.6 $m^{2}$ and that it radiates like an ideal radiator. Calculate the amount of energy radiated per second by the body if the body temperature is 37 $^{\circ}$ C.Stefan constant $σ$ is $6.0 \times 10^{- 8} W / m^{2} - K^{4}$ .

Q. A small hole in a furnace acts like a black body. Its area is

1

^{2}

, and its temperature is the same as that of the interior of the furnace,

1727

^{o}

C. The energy radiated out of the hole per second is nearly :

(Stefans constant =

5.67 \times 10^{- 8} W m^{- 2} K^{- 4}

)

Calculate the amount of heat radiated per second by a body of surface area 12 $c m^{2}$ kept in thermal equilibrium in a room at temperature $20^{0}$ C. The emissivity of the surface = 0.80 and $σ = 6.0 \times 10^{- 8} W m^{- 2} K^{- 4}$

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Assume that the total surface area of a human body is 1.6m2 and that it radiates like as ideal radiator . calculate the amount of energy radiated per second by the body if the body temperature is 370C .stefan constant αis6.0×10−8Wm−2K−4

A=1.6m2T=370C=310Kσ=6.0×10−8w/m2−k4energy radiated per second is:AσT4=1.6×6×10−8(310)4=8865801×10−4=886.58=887J

Assume that the total surface area of a human body is $1.6 m^{2}$ and that it radiates like as ideal radiator . calculate the amount of energy radiated per second by the body if the body temperature is $37^{0} C$ .stefan constant $α i s 6.0 \times 10^{- 8} W m^{- 2} K^{- 4}$

$A = 1.6 m^{2}$
$T = 37^{0} C = 310 K$
$σ = 6.0 \times 10^{- 8} w / m^{2} - k^{4}$
energy radiated per second is:
$A σ T^{4} = 1.6 \times 6 \times 10^{- 8} (310)^{4} = 8865801 \times 10^{- 4} = 886.58 = 887 J$