An extrasolar planet in the HD 4308 system orbits its parent star at a distance of 17.1 million kilometers and takes 15.56 Earth days to complete one orbit.
Given this and assuming that planet has a very low mass compared to the parent star, what is the mass of the parent star? A) 3.25 1030 kg
B) 2.00 1030 kg
C) 1.25 1030 kg
D) 1.64 1030 kg
Question 2
A string of linear density 1.5 g/m is under a tension of 20. N. What should its length be if its fundamental resonance frequency is 220. Hz?
A) 0.26 m
B) 1.1 m
C) 0.96 m
D) 43. cm
E) 2.1 m