The neurons in michael's arm just sent a neural impulse. it will be 1–2 milliseconds before another neural impulse can be generated. this brief time period, when another neural impulse cannot occur, is called the

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.