Beginning in 1996, a glacier lost an average of 3.7 meters of thickness each year. find the total change in its thickness by the end of 2012.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples