How does blood flow into the right atrium?(A)through the aorta.(B)through the pulmonary artery.(C)through the left ventricle.(D)through the vena cava. plz help if you don't know do not anwer

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

Which tool is least in predicting weather