The heart chamber that receives blood from the venue cavae is the
a. left atrium
b. right atrium
c. left ventricle
d. right ventricle

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient