Question

Calculate the $R$ -value of (a) a window made of a single pan e of flat glass $\frac{1}{8}$ in. thick and $(b)$ a thermal window made of two single panes each $\frac{1}{8}$ in. thick and separated by a $\frac{1}{4}$ -in. air space. (c) By what factor is the transfer of energy by heat through the window reduced by using the thermal window instead of the single-pane window?

Name: Calculate the R -value of (a) a window made of a single pan e of flat glass (1)/(8) in. thick and (b) a thermal window made of two single panes each (1)/(8) in. thick and separated by a (1)/(4) -in. air space. (c) By what factor is the transfer of energy by heat through the window reduced by using the thermal window instead of the single-pane window?
Uploaded: 2023-03-21T15:21:40-08:00
Duration: 2 min 9 s
Channel: Madhur L
Description: Calculate the R -value of (a) a window made of a single pan e of flat glass (1)/(8) in. thick and (b) a thermal window made of two single panes each (1)/(8) in. thick and separated by a (1)/(4) -in. air space. (c) By what factor is the transfer of energy by heat through the window reduced by using the thermal window instead of the single-pane window?

          Calculate the $R$ -value of (a) a window made of a single pan e of flat glass $\frac{1}{8}$ in. thick and $(b)$ a thermal window made of two single panes each $\frac{1}{8}$ in. thick and separated by a $\frac{1}{4}$ -in. air space. (c) By what factor is the transfer of energy by heat through the window reduced by using the thermal window instead of the single-pane window?

Added by Erik P.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Madhur L

03/21/2023

Step 1

The thermal conductivity of glass is approximately $0.8 \, \text{W/m} \cdot \text{K}$, and the thermal conductivity of air is approximately $0.024 \, \text{W/m} \cdot \text{K}$. (a) For the single-pane window, we can use the formula for the thermal resistance Show more…

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Calculate the $R$ -value of (a) a window made of a single pan e of flat glass $\frac{1}{8}$ in. thick and $(b)$ a thermal window made of two single panes each $\frac{1}{8}$ in. thick and separated by a $\frac{1}{4}$ -in. air space. (c) By what factor is the transfer of energy by heat through the window reduced by using the thermal window instead of the single-pane window?