What happens to gravitational force and electric force as the distance
between two charged objects decreases?
O
A. Gravitational force decreases and electric force increases
O
B. Gravitational force increases and electric force decreases.
O
C. Gravitational and electric forces increase
O
D. Gravitational and electric forces decrease.

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

What is an electric motor? explain its operation. 2-3 sentence

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve