Look up your latitude and explain the optimum angle to set a flat-panel collector
What will be an ideal response?
Answers depend on student location. The optimum angle for a non-adjustable flat plate is generally at the latitude angle from the horizontal but can be set steeper to optimize solar input for winter or flatter to optimize solar input for summer.
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Answer the following statements true (T) or false (F)
1. The Clean Water Act, originally passed in 1972, was successful in achieving its stated goal of eliminating the release of "toxics in toxic amounts" by 1985. 2. The quality of water in the nation's rivers and streams has improved so much that by 2016 nearly 100% of that nation's rivers and streams had a biological condition of good. 3. The greenhouse effect refers to the physical phenomenon in which certain gases accumulate in the atmosphere and tend to warm the planet because they reflect solar radiation back to the planet. Since CO2 concentrations have increased from 250 parts per million in 1900 to almost 405 by 2016, the greenhouse effect has increased. 4. Externalities always arise because of a failure of transferability.
Why are chillers often used to cool large buildings?
a. Chillers use less refrigerant than other units. b. Refrigerant piping is small because of low pressures. c. Refrigerant piping is small because of high pressure. d. Water piping is less expensive to install.
Sometimes, the needle on the meter swings back and forth. This is called ____________________.
Fill in the blank(s) with the appropriate word(s).
One disadvantage of alternative construction is that it requires high embodied energy.
Answer the following statement true (T) or false (F)