Hurricane Katrina flooded New Orleans when a(n) ________ broke
Fill in the blank(s) with correct word
levee
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Which of the following is true or accurate about the transition to renewable energies?
A) Coal can continue to be used as long as we keep atmospheric CO2 levels below 800 ppm. B) Natural gas, which produces less CO2 when burned, can serve as a "bridge energy" to the development of enough renewable energies. C) At present none of the U.S. states has any requirements or goals for the transition. D) Venture capitalists have invested very little in global renewable energy because of uncertainty about its effectiveness.
A student has equal-volume samples of three gases. All the gases are at the same temperature and pressure. If the three gases are O2, CO2, NH3, which sample contains the largest number of atoms?
A) O2 B) CO2 C) NH3 D) None, they all contain the same number of atoms.
Why does the melting point of hydrocarbons increase as the number of carbon atoms per molecule increases?
A. because of greater induced dipole-induced dipole molecular attractions B. Larger hydrocarbon chains tend to be branched. C. The molecular mass also increases. D. An increase in the number of carbon atoms per molecules also means an increase in the density of the hydrocarbon.
Which area did NOT have casualties caused by the Indonesian earthquake of 2004?
A. India and Sri Lanka B. Indonesia C. the eastern coast of Africa D. islands in the Indian Ocean E. All of these areas had casualties.