The thermal conductivity of a nonwoven fabric is given by λ = 0.03 + 0.00005ρ + 0.15/ρ where λ is the thermal conductivity of the fabric in W/(m⋅K), ρ is the bulk density of the fabric in kg/m3, and ρ∈[10,200]. The minimum value of thermal conductivity, in mW/(m⋅K), is approximately

The thermal conductivity of a nonwoven fabric is given by λ = 0.

1.	The thermal conductivity of a nonwoven fabric is given by  λ = 0.03 + 0.00005ρ + 0.15/ρ  where λ is the thermal conductivity of the fabric in W/(m⋅K), ρ is the bulk density of the fabric in kg/m3, and ρ∈[10,200]. The minimum value of thermal conductivity, in mW/(m⋅K), is approximately
A.	36
B.	39
C.	41
D.	46
Answer» B. 39

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