Which force controls the size of an atomic nucleus? 1electromagnetic force
2weak nuclear force
3strong nuclear force
4gravitational force

The plum pudding model of the atom state that ?

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

Could someone me find the answer to this problem.