Physics · Gravitation
The mass density of a spherical galaxy varies as Kr over a large distance r from its center. In that region, a small star is in a circular orbit of radius R. Then the period of revolution, T, depends on R as:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1T2 ∝ 1R3
- 2T ∝ R
- 3T2 ∝ R✓
- 4T2 ∝ R3
Correct answer
T2 ∝ R
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