Where does clean drinking water present the biggest problem? MDCs LDCs

Select the correct answer from each drop down menu. among these figures figure and blank have the same volume. 1 a c e 2 b d

How does the parallax of a nearby object compare to that of an object farther away?

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