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/â8T
b. 1/2T
c. 1/3â4T
d. 2T
e. â8T
Answers: 1
Another question on Physics
Physics, 22.06.2019 03:00
Do you agree with scientist’s prediction about the warming of alaska and other polar regions?
Answers: 2
Physics, 22.06.2019 07:20
If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?
Answers: 3
Physics, 22.06.2019 11:50
Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?
Answers: 2
Physics, 22.06.2019 12:30
Which levels of government establish and implement educational requirements for minors
Answers: 1
You know the right answer?
A space expedition discovers a planetary system consisting of a massive star and several spherical p...
Questions
Mathematics, 15.06.2021 20:50
Chemistry, 15.06.2021 20:50
Mathematics, 15.06.2021 20:50
History, 15.06.2021 20:50
Social Studies, 15.06.2021 20:50
Mathematics, 15.06.2021 20:50
Mathematics, 15.06.2021 20:50
