Which of these is NOT always true of fuel cells and hydrogen as a fuel source?
a. Making hydrogen does not produce greenhouse gases.
b. Water and heat are the only waste products from an operating fuel cell.
c. We will not run out of sources from which to get hydrogen.
d. Fuel cells only require a source of hydrogen and oxygen from the air to work.
Answer: A
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Dew PointFor the following questions refer to the temperature and dew point data in the following cities: CityAir Temperature (ºC)Dew Point (ºC)City A3524City B-12-12City C-1-6City D106Which city has the least amount of water vapour in the air?
A. City A B. City B C. City C D. City D
The property many metamorphic rocks exhibit by flat or elongated mineral grains in parallel layers is called
A) schist. B) cleavage. C) foliation. D) lithification.
What caused the Alpine orogeny? What will be an ideal response?
Subtropical deserts form close to ________ degrees north or south latitude
A) 0 B) 15 C) 30 D) 45 E) 60