Scientists observe an extremely long area in a continental plate.

In a repredentive democracy: a.) people come together in large meetings to vote on public policy b.) the people govern themselves c.) political power is held by a small group of people d.) people elect officials to run the government for them

Which of the following types of nonrenewable fuel sources requires the storage of radioactive waste? a. coal b. nuclear c. solar d. oil

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