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

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Solution

A = 1.6 $m^{2}, T = 37^{0} C = 310^{0}$ K

s = $6.0 \times 10^{- 8} w / m^{2} K^{4}$

Energy radiated per sec

= $A S T^{4} = 1.6 \times 6 \times 10^{- 8} \times 310^{4}$

= $8865801 \times 10^{- 4}$ = 886.58

= 887 J.

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Q. Assume that the total surface area of a human body is 1.6 m² 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°C. Stefan constant σ is 6.0 × 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. Assume that the total surface area of a human body is

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

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= 6.0 \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 1.6 m2 and that it radiates like an ideal radiator. Calculate the amount of enrgy radiated per second by the body if the body temperature is 370 C. Stefan constant σ is 6.0×10−8Wm−2K−4 .

A = 1.6 m2,T=370C=3100 K s = 6.0×10−8w/m2K4 Energy radiated per sec = AST4=1.6×6×10−8×3104 = 8865801×10−4 = 886.58 = 887 J.

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

A = 1.6 $m^{2}, T = 37^{0} C = 310^{0}$ K

s = $6.0 \times 10^{- 8} w / m^{2} K^{4}$

Energy radiated per sec

= $A S T^{4} = 1.6 \times 6 \times 10^{- 8} \times 310^{4}$

= $8865801 \times 10^{- 4}$ = 886.58

= 887 J.