Ametal sphere has a charge of +12c. what is the net charge after 5.9 x 1013 electrons have been placed on it?

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

True or false graphs must include scales that increase by the same amount

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.