What do scientists use to classify seismic waves?

What was the most difficult obstacle to overcome in the creation of an autonomous state after indian independence was achieved? a british willingness to go to war to retain the region b. religious differences between hindus and muslims c. ethnic differences between tribal regions d. indian princes' inability to decide on a format of government

What structure on the south african coast has a range of 63 km and releases flashes every 30 seconds?

People make choices about how to use resources.