The benefits of trade arise from specialization
Indicate whether the statement is true or false
TRUE
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Consider a flat-plate solar collector placed horizontally on the flat roof of a house. The collector is 5 ft wide and 15 ft long, and the average temperature of the exposed surface of the collector is 100°F. The emissivity of the exposed surface of the collector is 0.9. Determine the rate of heat loss from the collector by convection and radiation during a calm day when the ambient air temperature is 70°F and the effective sky temperature for radiation exchange is 50°F. Take the convection heat transfer coefficient on the exposed surface to be 2.5?Btu/h.ft2•°F.
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1. Only a few people need to participate in a study group 2. It is a good idea to wait until the night before the exam to study 3. It is a good idea to study for exams on a daily basis 4. Becoming acquainted with junior and senior engineering students can provide you with valuable information about their engineering education experience and campus social issues. 5. Volunteering is a way to develop additional important skills such as communication, management, or supervisory skills that may not be taught in your classes.
An information block provides ____.
A. an identification number B. revision dates C. parts list D. all of the above
In the 19th century, the business of horticulture was supported not only by the wealthy, but also by the
____, created by the Industrial Revolution and consisting of people with disposable income and the ability to buy floriculture products.
a. middle class economy c. merchant classes b. royalty in Europe d. patrons of the arts