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The escape velocity from the surface of the Earth is approximately . If a planet has twice the mass and twice the radius of the Earth, what is the escape velocity from its surface?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: B —
Solution
- The escape velocity is .
- For the new planet, and .
- The new escape velocity is .
- Calculating .
- Hence the answer is (B).
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