A space expedition discovers a planetary system consisting of a massive star and several spherical planets. The planets all have
the same uniform mass density. The orbit of each planet is circular. In the observed planetary system, Planet A orbits the central star at the distance of 2R and takes T hours to complete one revolution around the star. Planet B orbits the central star at the distance of R. Which of the following expressions is correct for the number of hours it takes Planet B to complete one revolution around the star? a. 1/√8T
b. 1/2T
c. 1/√4T
d. 2T
e. √8T
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions. <span>35x1.3/1000000 = 0.0000455g = 0.0455 mg = 45.5 microgram/L</span>