Kristinmcconkey863 Kristinmcconkey863
  • 24-10-2019
  • Physics
contestada

A very good insulator has an R-value of 29. The material's heat transfer coefficient is


A 14.5


b. 0.034


c. 8.497


d.29

Respuesta :

skyluke89
skyluke89 skyluke89
  • 27-10-2019

Answer:

b. 0.034

Explanation:

The heat transfer coefficient of a material (U-value) is equal to the reciprocal of its R-value, therefore:

[tex]U = \frac{1}{R}[/tex]

where

R is the R-value of the material

For the insulator in this problem,

R = 29

Substituting into the equation, we find the heat transfer coefficient:

[tex]U=\frac{1}{29}=0.034[/tex]

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