Select all the correct answers.
which two statements are true?
the definitions for electric force and electromagnetic force are identical.
electric forces and magnetic forces are different aspects of a single electromagnetic force.
the operation of a motor depends on the relationship between electric and magnetic forces.
d
a magnet must be moving for a magnetic force field to exist.

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