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The escape velocity from the surface of a planet is . If the mass of the planet is doubled and its radius is halved, the new escape velocity will be:
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: B —
Solution
- The escape velocity is .
- The new escape velocity is .
- This simplifies to .
- Therefore .
- Hence the answer is (B).
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