Two spherical point charges each carrying a charge of 40 c are attached to the two ends of a spring of length 20 cm. if its spring constant is 120 nm-1, what is the length of the spring when the charges are in equilibrium?

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