Calculate the overall U-value for a 12-in.-thick concrete wall with the wind blowing over its outside surface (h = 5.88 Btu/h·ft2 ·°F), and still air over its inside surface (h = 1.47 Btu/h·ft2 ·°F).
What will be an ideal response?
For the situation where wind is blowing over the outside surface,
For still air over its inside surface,
U-factor for the wall is equal to
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?
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What will be an ideal response?
What is the correct stoichiometric ratio for the reagents when anhydrides react with amines to form an amide and an ammonium carboxylate salt?
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