Which of the following statements about PV cells is false?
a. Not only Google, but more than 75 schools and colleges in California have parking lots covered with canopies of PV cells
b. Solar cells have no moving parts and are safe and quiet
c. The U.S. government is the current global leader in photovoltaic production.
d. Generating electricity with such solar cells could be nearly as efficient as using coal-burning power plants
e. Over the next one to two decades production of such cells is expected to increase sharply
C
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Which mnemonic helps fire fighters remember a set of lighter-than-air gases?
a. OH ME TOO b. BRAIN TO DO c. HA HA MICEN d. BARKING SEALS
"Air masses that move over deserts are dry." Evaluate this statement
A) This statement is true. B) This statement is partially true; however, rain-shadow deserts carry moist coastal air across the desert without dropping the moisture from the air mass. C) This statement is partially true; coastal deserts often have large wet-air masses move over them, but the air mass does not drop moisture. D) This statement is false.
When will stream discharge likely be the highest?
A) as the stream flows through the narrowest part of the channel B) during periods of heavy rainfall C) in the winter when the snow packs are the greatest D) in late fall or winter when the area begins to freeze E) as it flows midstream, especially in summer
On the lee side of the mountain, is the relative humidity of the parcel increasing or decreasing as it descends from 4000 meters to sea level? Why?
Assume that a parcel of air is forced to rise up and over a 4000-meter-high mountain (as shown). The initial temperature of the parcel at sea level is 30°C, and the lifting condensation level (LCL) of the parcel is 2000 meters. The DAR is 10°C/1000 m and the SAR is 6°C/1000 m. Assume that condensation begins at 100% relative humidity and that no evaporation takes place as the parcel descends.
