Question

Find the $R$ value of a brick wall 4.0 in. thick.

   Find the $R$ value of a brick wall 4.0 in. thick.

Applied Physics

Applied Physics

Dale Ewen, Neil… 11th Edition

Chapter 14, Problem 2

Instant Answer

Solved by Expert Shahab Ullah

06/10/2021

Step 1

0 inches. We need to convert this to feet for our calculations. We know that 1 foot is equal to 12 inches, so we divide 4.0 by 12 to get the thickness in feet. \[Thickness = \frac{4.0 \, in}{12} = 0.33 \, ft\] Show more…

Show all steps

lock

Thanks for your feedback!

Find the $R$ value of a brick wall 4.0 in. thick.

Play audio

Feedback

Powered by NumerAI

Shahab Ullah and 60 other subject Physics 101 Mechanics educators are ready to help you.

Ask a new question

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Material Thickness

The thickness of a material directly influences its thermal resistance. In the context of calculating the R-value, the thickness of the material is divided by its thermal conductivity. When thickness is provided in non-standard units, appropriate unit conversion is necessary to ensure consistency in the calculation.

Thermal Resistance (R-Value)

This is a measure of a material's ability to resist the flow of heat. In building science, an R-value indicates how effective a material is as an insulator, with higher values representing better thermal resistance. It is calculated by dividing the thickness of the material by its thermal conductivity.

Thermal Conductivity

This property of a material defines how readily heat is conducted through it. Materials with high thermal conductivity allow heat to pass through more easily, resulting in lower R-values when normalized by thickness. It is a critical factor in determining the insulation performance of any building component.

Recommended Videos

Transcript

Ace is your personal tutor. It breaks down any question with clear steps so you can learn.

Start Using Ace

Continue solving this problem

Create a free account to:

View full step-by-step solution
Ask follow-up questions with Ace AI
Save progress and study later