1. how many trials did it take for half of the virtualium atoms to decay?

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

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.

How does photosynthesis show the conservation of mass and energy?