Barton conducts an experiment using three metallic bars that might be magnets. the bars are labeled a, b, and c. the ends of each bar are numbered 1 or 2. 1a2 | 1b2 | 1c2 he places the end of one bar close to an end of a second bar and records his results in the table shown. based on the data, which prediction should he expect to occur? a) a2 repels b1. b) c2 attracts b2. c) b1 repels c1. d) a1 attracts c2.

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

In the united states, tornadoes generally occur because of the freezing of ocean water underwater earthquakes meeting of cool and warm air masses shifting of warm and cool ocean currents

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