A plane takes off from an elevation of 0m and reaches a final elevation of 3000m. It takes the plane 100km to reach its final altitude. What is the gradient of the plane’s flight?

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

Hurricanes a. usually form over land b. usually intensify over land c. gain strength from ocean heat d. usually form over the poles

What is the pattern of urbanisation around the word?