Two metal balls are charged. Ball A has a charge of +7 and ball B has a charge of -3. What will the charge on these balls be after they come into contact and then are separated?

+2

Explanation:

When in contact, the net charge on the balls will be given by getting the sum of the two charges, considering the signs hence net charge will be+7+-3=+4

Now, with the above net charge, when separation occurs, the charges are divided equally hence :

Therefore, the charge on these balls after coming into contact then separated will be +2 as calculated above.

hey , the answer is c

grav potential energy