How do you know if an object has an equal net force? How do you know if an object has an unequal net force? ​

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

Name two kinds of practical electric pumps.

Which of the following describes how a microwave heats food