What is the relative ratio of height to wavelength in a tsunami?
A) It is extremely high.
B) It is incalculable.
C) It is extremely low.
D) None of these choices
C
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According to the octet rule, atoms tend to gain, lose, or share electrons until they are surrounded by ________ valence electrons
A) 2 B) 6 C) 8 D) 10
Why hasn't the use of catalytic convertors reduced the amount of CO2 in the atmosphere?
A. CO2 is increased by their use. B. They only breakdown VOCs. C. They simply don't work. D. They only breakdown NO2.
Even if people cannot easily spread bird flu from person to person, how might the virus that causes bird flu spread in the world?
A) Vaccines against bird flu might spread the disease around the world. B) Antibiotics against bird flu will stop working. C) Migrating birds might spread the flu widely. D) Hunters shooting the birds and eating the meat might become infected.
A precipitate is formed when soaps are used in waters which contain which of the following cations?
A) Ca2+ B) K+ C) either a and b D) neither a nor b