South africa was divided into four racial classes,
including white, black, colored and asian.
true
false

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

Countries that have a traditional economy often develop at a slower pace than countries with a free market economy. true or false

Quais são as consequencias (positivas e negativas) da extração dos minerais metálicos