How can earthquakes, volcanoes, landslides , and floods change the coastlines?

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.

How can studying economics us make better choices about how to use scare resources

What was apartheid and how did it restrict the rights of non-whites?