5difference between the revolution of the earth and rotation of the earth

Giving the right triangle jkl what is the value of cos (l)

What is a small water source like a stream or brook?

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