Answer :

Final answer:

For a textured wall finish, two to three coats of drywall mud are typically applied, starting with taping seams and covering imperfections, followed by creating the basic texture and optionally refining it further. The R factor provided relates to the material's thermal resistance, important for physics calculations on heat flow through a wall.

Explanation:

If a textured wall finish is desired, the number of coats of drywall mud that will be applied typically ranges from two to three coats. The first coat is to tape and cover the seams and nail or screw indentations. The second coat, often called the filler coat, smooths out the imperfections and creates the basic texture. The optional third coat, or finish coat, is used to refine the texture and ensure an even and smooth base if painting is desired. However, the actual number of coats may vary depending on the type of texture and the desired final appearance.

In the given problem, the R factor of the drywall and other materials is stated concerning the heat flow through a house wall with specific dimensions. For physics calculations related to thermal insulation and heat transfer, these R-value information are vital. The R factor is a measure of the thermal resistance of a material, and it is essential for determining the effectiveness of insulation in preventing heat loss or gain.

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