The Critical Radius of Insulation for a Spherical Shell Is

question 18

Multiple Choice

The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h₀ = heat transfer coefficient at the outer surface)

• A)K/h₀
• B)2K/h₀
• C)h₀/K
• D)h₀/2K

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