After performing rescue breathing on an adult for about 2 minutes, you look for movement and recheck for breathing and a pulse. You find that the adult no longer has a pulse. Where should you position your hands on the adult for CPR?

Two hands on the center of the chest.

Explanation:

Cardiopulmonary resuscitation is an emergency technique which include  chest compressions along with an artificial ventilation to maintain preserved brain function manually before further action is taken to restore normal blood supply and breathing in a heart arrested individual.

Chest compressions will be provided if there is no pulse along with ventilations at a rate of 30:2 and the two hands will be placed on the center of the chest.

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.