Which of the following is true about the mass of an object? it decreases if weight increases. it cannot be measured accurately. it is the amount of matter in the object. it is the amount of space occupied by the object.

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.