The maximum specific humidity of air at 20°C (68°F) is 15g. If a kilogram of air at 20°C (68°F) has a specific humidity of 7.5 g/kg, what is its relative humidity? Show your work
A. 30%
B. 75%
C. 50%
D. 70%
Answer: C. 50%
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Of the 5 major groups in the Köppen classification system, which letter below indicates the classification that is based primarily on precipitation?
A) A B) B C) C D) D E) E
What kind of movement of particles is able to move against normal concentration gradients?
a. Active transport b. Diffusion c. Osmosis d. Dispersion
Electricity from nuclear power plants is produced via ________
A) the fission of uranium or plutonium atoms by bombarding them with neutrons B) the fusion of electrons by bombarding them with uranium or plutonium atoms C) bombarding radioactive elements with electrons D) the fusion of nuclei of atoms
A small piece of chalk made of calcium carbonate can be useful for alleviating acid indigestion because calcium carbonate is
A. able to turn the acid into a gas which can relieve the buildup of excess acid. B. able to add an extra lining to the stomach to protect it from the excess acid. C. able to absorb excess acid and carry it out of the system. D. a base that reacts to neutralize any excess acids.