Sorry posted this question in the wrong section!

why would a country use tariffs?

a. to block trade with other countries

b. to eliminate imported goods

c. to increase trade with other countries

d. to make the price of its goods competitive

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