Sam does an experiment in his lab. He discovers that the mass of the reactants before his experiment is the same as the mass of the products after his experiment. What did he prove?
The law of conservation of mass
The law of conservation of energy
O Physical properties only change during chemical reactions.
He messed up the experiment because the mass should have been different

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

the titanic would be the correct answer

answer; incomplete dominance;

to this answer it would be edge enhancement