Two trains start a journey at the same time 120 miles apart, travelling towards each other. the first train is travelling at 60 mph and the second train is travelling at 40 mph. how long does it take for the two trains to meet?

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels.the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause,directly and indirectly, for such a rise in sea level is