We often turn the fan on in summer to help us cool. Explain how a fan makes us feel cooler in the summer. Also explain why some people use ceiling fans also in winter.
What will be an ideal response?
The fan increases the air motion around the body and thus the convection heat transfer coefficient, which increases the rate of heat transfer from the body by convection and evaporation. In rooms with high ceilings, ceiling fans are used in winter to force the warm air at the top downward to increase the air temperature at the body level. This is usually done by forcing the air up which hits the ceiling and moves downward in a gently manner to avoid drafts.
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A series of lines - solid or solid and broken - arranged in specific patterns that show a surface are known as ____________________ lines.
Fill in the blank(s) with the appropriate word(s).
Payments are typically made twice during construction.
Answer the following statement true (T) or false (F)
____________________ classes are judged on the flat (not over jumps) at the walk, trot, and canter.
Fill in the blank(s) with the appropriate word(s).
Which one of the following is not an advantage of light shelves?
A) Light shelve reduce electric lighting B) Light shelves block solar heat gain C) Light shelves increase solar heat gain D) Light shelves add natural lighting to indoor spaces