A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.9 x 1020 m, and the angular spee
d of the star is 9.2 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?
1 answer:
Answer:
2.16 x 10^7 years
Explanation:
R = 6.9 x 10^20 m
ω = 9.2 x 10^-15 rad/s
T = 2π / ω
T = ( 2 x 3.14 ) / ( 9.2 x 10^-15)
T = 6.826 x 10^14 second
T = 2.16 x 10^7 years
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