Energetically, a fusion reaction can be self-sustaining whenever
A) the reaction obeys the principle of conservation of total energy.
B) the reaction proceeds from higher to lower energies on the nuclear energy curve.
C) the reaction proceeds from heavier to lighter nuclei on the nuclear energy curve.
D) the reaction proceeds from lighter nuclei to heavier nuclei on the nuclear energy curve.
E) the reaction proceeds from lower to higher energies on the nuclear energy curve.
B
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What observation made of other stars seems to suggest the solar nebula hypothesis is correct?
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The interior layer just below the crust of Earth is called the ________.
A. inner core B. mantle C. troposphere D. outer core
Which wave has the greatest period of oscillation?
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