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The earth rotates on its axis and revolves around the sun every

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

Agriculture is a. slowly being replaced by mining as the primary industry in southern africa c. not possible in southern africa because of drought b. the primary industry in southern africa d. none of the above