Which of the following energy sources provides the greatest share of renewable energy consumed in the U.S.?
A. conventional hydropower
B. geothermal power
C. solar energy
D. wind energy
Answer: A
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If a star collapses to a tenth its size, gravitation at its surface increases by
A. one hundred. B. one thousand. C. twenty. D. ten. E. more than one thousand.
Carbon monoxide is produced when organic materials are incompletely burned.
Answer the following statement true (T) or false (F)
According to the kinetic molecular theory, which of the following is not true?
A) Gas molecules are assumed to have no volume. B) Gas pressure is caused by collisions between gas molecules and the container walls. C) When gas molecules collide energy is lost. D) None, all of the above are true.
Where does the salt in the oceans come from?
A. precipitation B. melting of ice at the Poles C. comets D. runoff from the continents